Colorado PROFILES, The Colorado Clinical and Translational Sciences Institute (CCTSI)
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Christian J Hopfer

TitleProfessor
InstitutionUniversity of Colorado Denver - Anschutz Medical Campus
DepartmentSOM-PSYCH
Phone303/724-3170

    Collapse Research 
    Collapse research activities and funding
    R01DA015522     (HOPFER, CHRISTIAN J)Sep 10, 2003 - Dec 30, 2008
    NIH/NIDA
    A family study of substance use &conduct disorder
    Role: Principal Investigator

    R01DA021913     (HOPFER, CHRISTIAN J)Jul 1, 2008 - Aug 31, 2013
    NIH/NIDA
    Genetics of Adolescent Antisocial Drug Dependence
    Role: Principal Investigator

    R25DA033219     (HOPFER, CHRISTIAN J)Apr 1, 2012 - Mar 31, 2018
    NIH/NIDA
    Substance Use Disorder Research Training for Medical Students
    Role: Principal Investigator

    K24DA032555     (HOPFER, CHRISTIAN J)Apr 1, 2013 - Mar 31, 2018
    NIH/NIDA
    Mentoring Clinical Investigators in Adolescent-onset Substance Use Disorders Rese
    Role: Principal Investigator

    R01DA035804     (HOPFER, CHRISTIAN J)Apr 15, 2014 - Jan 31, 2019
    NIH/NIDA
    Genetics and Progression of Early-onset Substance Dependence and HIV Risk
    Role: Principal Investigator

    R01DA042755     (HOPFER, CHRISTIAN J)Sep 1, 2017 - May 31, 2022
    NIH/NIDA
    Impact of Marijuana Legalization: Comparison of Two Longitudinal Twin Cohorts
    Role: Principal Investigator

    Collapse Bibliographic 
    Collapse selected publications
    Publications listed below are automatically derived from MEDLINE/PubMed and other sources, which might result in incorrect or missing publications. Faculty can login to make corrections and additions.
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    1. Klawitter J, Sempio C, Mörlein S, De Bloois E, Klepacki J, Henthorn T, Leehey MA, Hoffenberg EJ, Knupp K, Wang GS, Hopfer C, Kinney G, Bowler R, Foreman N, Galinkin J, Christians U, Klawitter J. An Atmospheric Pressure Chemical Ionization MS/MS Assay Using Online Extraction for the Analysis of 11 Cannabinoids and Metabolites in Human Plasma and Urine. Ther Drug Monit. 2017 Oct; 39(5):556-564. PMID: 28640062.
      View in: PubMed
    2. Clark DB, Fisher CB, Bookheimer S, Brown SA, Evans JH, Hopfer C, Hudziak J, Montoya I, Murray M, Pfefferbaum A, Yurgelun-Todd D. Biomedical ethics and clinical oversight in multisite observational neuroimaging studies with children and adolescents: The ABCD experience. Dev Cogn Neurosci. 2017 Jun 28. PMID: 28716389.
      View in: PubMed
    3. Wills AG, Evans LM, Hopfer C. Phenotypic and Genetic Relationship Between BMI and Drinking in a Sample of UK Adults. Behav Genet. 2017 May; 47(3):290-297. PMID: 28238197.
      View in: PubMed
    4. Luk JW, Trim RS, Karyadi KA, Curry I, Hopfer CJ, Hewitt JK, Stallings MC, Brown SA, Wall TL. Unique and interactive effects of impulsivity facets on reckless driving and driving under the influence in a high-risk young adult sample. Pers Individ Dif. 2017 Aug 01; 114:42-47. PMID: 29038610.
      View in: PubMed
    5. Luk JW, Worley MJ, Winiger E, Trim RS, Hopfer CJ, Hewitt JK, Brown SA, Wall TL. Risky driving and sexual behaviors as developmental outcomes of co-occurring substance use and antisocial behavior. Drug Alcohol Depend. 2016 Dec 01; 169:19-25. PMID: 27750183.
      View in: PubMed
    6. Melroy-Greif WE, Vadasz C, Kamens HM, McQueen MB, Corley RP, Stallings MC, Hopfer CJ, Krauter KS, Brown SA, Hewitt JK, Ehringer MA. Test for association of common variants in GRM7 with alcohol consumption. Alcohol. 2016 Sep; 55:43-50. PMID: 27788777.
      View in: PubMed
    7. Sakai JT, Mikulich-Gilbertson SK, Young SE, Rhee SH, McWilliams SK, Dunn R, Salomonsen-Sautel S, Thurstone C, Hopfer CJ. Adolescent Male Conduct-Disordered Patients in Substance Use Disorder Treatment: Examining the "Limited Prosocial Emotions" Specifier. J Child Adolesc Subst Abuse. 2016; 25(6):613-625. PMID: 28979087.
      View in: PubMed
    8. Hopfer C. Declining Rates of Adolescent Marijuana Use Disorders During the Past Decade May Be Due to Declining Conduct Problems. J Am Acad Child Adolesc Psychiatry. 2016 Jun; 55(6):439-40. PMID: 27238061.
      View in: PubMed
    9. Kamens HM, Corley RP, Richmond PA, Darlington TM, Dowell R, Hopfer CJ, Stallings MC, Hewitt JK, Brown SA, Ehringer MA. Evidence for Association Between Low Frequency Variants in CHRNA6/CHRNB3 and Antisocial Drug Dependence. Behav Genet. 2016 Sep; 46(5):693-704. PMID: 27085880; PMCID: PMC4975622 [Available on 09/01/17].
    10. Stringer S, Minica CC, Verweij KJ, Mbarek H, Bernard M, Derringer J, van Eijk KR, Isen JD, Loukola A, Maciejewski DF, Mihailov E, van der Most PJ, Sánchez-Mora C, Roos L, Sherva R, Walters R, Ware JJ, Abdellaoui A, Bigdeli TB, Branje SJ, Brown SA, Bruinenberg M, Casas M, Esko T, Garcia-Martinez I, Gordon SD, Harris JM, Hartman CA, Henders AK, Heath AC, Hickie IB, Hickman M, Hopfer CJ, Hottenga JJ, Huizink AC, Irons DE, Kahn RS, Korhonen T, Kranzler HR, Krauter K, van Lier PA, Lubke GH, Madden PA, Mägi R, McGue MK, Medland SE, Meeus WH, Miller MB, Montgomery GW, Nivard MG, Nolte IM, Oldehinkel AJ, Pausova Z, Qaiser B, Quaye L, Ramos-Quiroga JA, Richarte V, Rose RJ, Shin J, Stallings MC, Stiby AI, Wall TL, Wright MJ, Koot HM, Paus T, Hewitt JK, Ribasés M, Kaprio J, Boks MP, Snieder H, Spector T, Munafò MR, Metspalu A, Gelernter J, Boomsma DI, Iacono WG, Martin NG, Gillespie NA, Derks EM, Vink JM. Genome-wide association study of lifetime cannabis use based on a large meta-analytic sample of 32 330 subjects from the International Cannabis Consortium. Transl Psychiatry. 2016 Mar 29; 6:e769. PMID: 27023175; PMCID: PMC4872459.
    11. Haberstick BC, Boardman JD, Wagner B, Smolen A, Hewitt JK, Killeya-Jones LA, Tabor J, Halpern CT, Brummett BH, Williams RB, Siegler IC, Hopfer CJ, Mullan Harris K. Depression, Stressful Life Events, and the Impact of Variation in the Serotonin Transporter: Findings from the National Longitudinal Study of Adolescent to Adult Health (Add Health). PLoS One. 2016; 11(3):e0148373. PMID: 26938215; PMCID: PMC4777542.
    12. Bartels K, Binswanger IA, Hopfer CJ. Sources of Prescription Opioids for Nonmedical Use. J Addict Med. 2016 Mar-Apr; 10(2):134. PMID: 26985647; PMCID: PMC4800822 [Available on 03/01/17].
    13. Choi TK, Worley MJ, Trim RS, Howard D, Brown SA, Hopfer CJ, Hewitt JK, Wall TL. Effect of adolescent substance use and antisocial behavior on the development of early adulthood depression. Psychiatry Res. 2016 Apr 30; 238:143-149. PMID: 27086224.
      View in: PubMed
    14. Bartels K, Mayes LM, Dingmann C, Bullard KJ, Hopfer CJ, Binswanger IA. Opioid Use and Storage Patterns by Patients after Hospital Discharge following Surgery. PLoS One. 2016; 11(1):e0147972. PMID: 26824844; PMCID: PMC4732746.
    15. El Omari F, Salomonsen-Sautel S, Hoffenberg A, Anderson T, Hopfer C, Toufiq J. Prevalence of substance use among moroccan adolescents and association with academic achievement. World J Psychiatry. 2015 Dec 22; 5(4):425-31. PMID: 26740934; PMCID: PMC4694556.
    16. Coors ME, Raymond KM, Hopfer CJ, Sakai J, McWilliams SK, Young S, Mikulich-Gilbertson SK. Adolescents with substance use disorder and assent/consent: Empirical data on understanding biobank risks in genomic research. Drug Alcohol Depend. 2016 Feb 01; 159:267-71. PMID: 26774949; PMCID: PMC4745974 [Available on 02/01/17].
    17. Schwantes-An TH, Zhang J, Chen LS, Hartz SM, Culverhouse RC, Chen X, Coon H, Frank J, Kamens HM, Konte B, Kovanen L, Latvala A, Legrand LN, Maher BS, Melroy WE, Nelson EC, Reid MW, Robinson JD, Shen PH, Yang BZ, Andrews JA, Aveyard P, Beltcheva O, Brown SA, Cannon DS, Cichon S, Corley RP, Dahmen N, Degenhardt L, Foroud T, Gaebel W, Giegling I, Glatt SJ, Grucza RA, Hardin J, Hartmann AM, Heath AC, Herms S, Hodgkinson CA, Hoffmann P, Hops H, Huizinga D, Ising M, Johnson EO, Johnstone E, Kaneva RP, Kendler KS, Kiefer F, Kranzler HR, Krauter KS, Levran O, Lucae S, Lynskey MT, Maier W, Mann K, Martin NG, Mattheisen M, Montgomery GW, Müller-Myhsok B, Murphy MF, Neale MC, Nikolov MA, Nishita D, Nöthen MM, Nurnberger J, Partonen T, Pergadia ML, Reynolds M, Ridinger M, Rose RJ, Rouvinen-Lagerström N, Scherbaum N, Schmäl C, Soyka M, Stallings MC, Steffens M, Treutlein J, Tsuang M, Wall TL, Wodarz N, Yuferov V, Zill P, Bergen AW, Chen J, Cinciripini PM, Edenberg HJ, Ehringer MA, Ferrell RE, Gelernter J, Goldman D, Hewitt JK, Hopfer CJ, Iacono WG, Kaprio J, Kreek MJ, Kremensky IM, Madden PA, McGue M, Munafò MR, Philibert RA, Rietschel M, Roy A, Rujescu D, Saarikoski ST, Swan GE, Todorov AA, Vanyukov MM, Weiss RB, Bierut LJ, Saccone NL. Association of the OPRM1 Variant rs1799971 (A118G) with Non-Specific Liability to Substance Dependence in a Collaborative de novo Meta-Analysis of European-Ancestry Cohorts. Behav Genet. 2016 Mar; 46(2):151-69. PMID: 26392368; PMCID: PMC4752855 [Available on 03/01/17].
    18. Coors ME, Raymond KM, McWilliams SK, Hopfer CJ, Mikulich-Gilbertson SK. Adolescent perspectives on the return of individual results in genomic addiction research. Psychiatr Genet. 2015 Jun; 25(3):127-30. PMID: 25748091.
      View in: PubMed
    19. Trim RS, Worley MJ, Wall TL, Hopfer CJ, Crowley TJ, Hewitt JK, Brown SA. Bivariate Trajectories of Substance Use and Antisocial Behavior: Associations with Emerging Adult Outcomes in a High-Risk Sample. Emerg Adulthood. 2015 Aug 01; 3(4):265-276. PMID: 26889401.
      View in: PubMed
    20. Derringer J, Corley RP, Haberstick BC, Young SE, Demmitt BA, Howrigan DP, Kirkpatrick RM, Iacono WG, McGue M, Keller MC, Brown S, Tapert S, Hopfer CJ, Stallings MC, Crowley TJ, Rhee SH, Krauter K, Hewitt JK, McQueen MB. Genome-Wide Association Study of Behavioral Disinhibition in a Selected Adolescent Sample. Behav Genet. 2015 Jul; 45(4):375-81. PMID: 25637581; PMCID: PMC4459903.
    21. Coors ME, Raymond KM, McWilliams SK, Hopfer CJ, Mikulich-Gilbertson SK. What adolescents enrolled in genomic addiction research want to know about conflicts of interest. Drug Alcohol Depend. 2015 Feb 01; 147:272-5. PMID: 25577477; PMCID: PMC4360983.
    22. Salomonsen-Sautel S, Min SJ, Sakai JT, Thurstone C, Hopfer C. Trends in fatal motor vehicle crashes before and after marijuana commercialization in Colorado. Drug Alcohol Depend. 2014 Jul 01; 140:137-44. PMID: 24831752; PMCID: PMC4068732.
    23. Melroy WE, Stephens SH, Sakai JT, Kamens HM, McQueen MB, Corley RP, Stallings MC, Hopfer CJ, Krauter KS, Brown SA, Hewitt JK, Ehringer MA. Examination of genetic variation in GABRA2 with conduct disorder and alcohol abuse and dependence in a longitudinal study. Behav Genet. 2014 Jul; 44(4):356-67. PMID: 24687270; PMCID: PMC4098655.
    24. Hopfer C. Community, siblings, heritability and the risk for drug abuse. Am J Psychiatry. 2014 Feb; 171(2):140-1. PMID: 24500456.
      View in: PubMed
    25. Hopfer C. Implications of marijuana legalization for adolescent substance use. Subst Abus. 2014; 35(4):331-5. PMID: 25127003; PMCID: PMC4308295.
    26. Haberstick BC, Young SE, Zeiger JS, Lessem JM, Hewitt JK, Hopfer CJ. Prevalence and correlates of alcohol and cannabis use disorders in the United States: results from the national longitudinal study of adolescent health. Drug Alcohol Depend. 2014 Mar 01; 136:158-61. PMID: 24440049; PMCID: PMC3963405.
    27. Stephens SH, Hartz SM, Hoft NR, Saccone NL, Corley RC, Hewitt JK, Hopfer CJ, Breslau N, Coon H, Chen X, Ducci F, Dueker N, Franceschini N, Frank J, Han Y, Hansel NN, Jiang C, Korhonen T, Lind PA, Liu J, Lyytikäinen LP, Michel M, Shaffer JR, Short SE, Sun J, Teumer A, Thompson JR, Vogelzangs N, Vink JM, Wenzlaff A, Wheeler W, Yang BZ, Aggen SH, Balmforth AJ, Baumeister SE, Beaty TH, Benjamin DJ, Bergen AW, Broms U, Cesarini D, Chatterjee N, Chen J, Cheng YC, Cichon S, Couper D, Cucca F, Dick D, Foroud T, Furberg H, Giegling I, Gillespie NA, Gu F, Hall AS, Hällfors J, Han S, Hartmann AM, Heikkilä K, Hickie IB, Hottenga JJ, Jousilahti P, Kaakinen M, Kähönen M, Koellinger PD, Kittner S, Konte B, Landi MT, Laatikainen T, Leppert M, Levy SM, Mathias RA, McNeil DW, Medland SE, Montgomery GW, Murray T, Nauck M, North KE, Paré PD, Pergadia M, Ruczinski I, Salomaa V, Viikari J, Willemsen G, Barnes KC, Boerwinkle E, Boomsma DI, Caporaso N, Edenberg HJ, Francks C, Gelernter J, Grabe HJ, Hops H, Jarvelin MR, Johannesson M, Kendler KS, Lehtimäki T, Magnusson PK, Marazita ML, Marchini J, Mitchell BD, Nöthen MM, Penninx BW, Raitakari O, Rietschel M, Rujescu D, Samani NJ, Schwartz AG, Shete S, Spitz M, Swan GE, Völzke H, Veijola J, Wei Q, Amos C, Cannon DS, Grucza R, Hatsukami D, Heath A, Johnson EO, Kaprio J, Madden P, Martin NG, Stevens VL, Weiss RB, Kraft P, Bierut LJ, Ehringer MA. Distinct loci in the CHRNA5/CHRNA3/CHRNB4 gene cluster are associated with onset of regular smoking. Genet Epidemiol. 2013 Dec; 37(8):846-59. PMID: 24186853; PMCID: PMC3947535.
    28. Thurstone C, Salomonsen-Sautel S, Mikulich-Gilbertson SK, Hartman CA, Sakai JT, Hoffenberg AS, McQueen MB, Min SJ, Crowley TJ, Corley RP, Hewitt JK, Hopfer CJ. Prevalence and predictors of injection drug use and risky sexual behaviors among adolescents in substance treatment. Am J Addict. 2013 Nov-Dec; 22(6):558-65. PMID: 24131163; PMCID: PMC3931469.
    29. Palmer RH, Young SE, Corley RP, Hopfer CJ, Stallings MC, Hewitt JK. Stability and change of genetic and environmental effects on the common liability to alcohol, tobacco, and cannabis DSM-IV dependence symptoms. Behav Genet. 2013 Sep; 43(5):374-85. PMID: 23760788; PMCID: PMC3794456.
    30. Haberstick BC, Lessem JM, Hewitt JK, Smolen A, Hopfer CJ, Halpern CT, Killeya-Jones LA, Boardman JD, Tabor J, Siegler IC, Williams RB, Mullan Harris K. MAOA genotype, childhood maltreatment, and their interaction in the etiology of adult antisocial behaviors. Biol Psychiatry. 2014 Jan 01; 75(1):25-30. PMID: 23726513; PMCID: PMC3815496.
    31. Hartman C, Hopfer C, Corley R, Hewitt J, Stallings M. Using Cloninger's temperament scales to predict substance-related behaviors in adolescents: a prospective longitudinal study. Am J Addict. 2013 May-Jun; 22(3):246-51. PMID: 23617866; PMCID: PMC3786421.
    32. Palmer RH, Knopik VS, Rhee SH, Hopfer CJ, Corley RC, Young SE, Stallings MC, Hewitt JK. Prospective effects of adolescent indicators of behavioral disinhibition on DSM-IV alcohol, tobacco, and illicit drug dependence in young adulthood. Addict Behav. 2013 Sep; 38(9):2415-21. PMID: 23685327; PMCID: PMC3681900.
    33. Hopfer C, Salomonsen-Sautel S, Mikulich-Gilbertson S, Min SJ, McQueen M, Crowley T, Young S, Corley R, Sakai J, Thurstone C, Hoffenberg A, Hartman C, Hewitt J. Conduct disorder and initiation of substance use: a prospective longitudinal study. J Am Acad Child Adolesc Psychiatry. 2013 May; 52(5):511-518.e4. PMID: 23622852; PMCID: PMC3813459.
    34. Kamens HM, Corley RP, McQueen MB, Stallings MC, Hopfer CJ, Crowley TJ, Brown SA, Hewitt JK, Ehringer MA. Nominal association with CHRNA4 variants and nicotine dependence. Genes Brain Behav. 2013 Apr; 12(3):297-304. PMID: 23350800; PMCID: PMC3727281.
    35. Hunter LE, Hopfer C, Terry SF, Coors ME. Reporting actionable research results: shared secrets can save lives. Sci Transl Med. 2012 Jul 18; 4(143):143cm8. PMID: 22814848; PMCID: PMC3501742.
    36. Salomonsen-Sautel S, Sakai JT, Thurstone C, Corley R, Hopfer C. Medical marijuana use among adolescents in substance abuse treatment. J Am Acad Child Adolesc Psychiatry. 2012 Jul; 51(7):694-702. PMID: 22721592; PMCID: PMC3381870.
    37. Sakai JT, Crowley TJ, Stallings MC, McQueen M, Hewitt JK, Hopfer C, Hoft NR, Ehringer MA. Test of association between 10 single nucleotide polymorphisms in the oxytocin receptor gene and conduct disorder. Psychiatr Genet. 2012 Apr; 22(2):99-102. PMID: 21934640; PMCID: PMC3337143.
    38. Zeiger JS, Haberstick BC, Corley RP, Ehringer MA, Crowley TJ, Hewitt JK, Hopfer CJ, Stallings MC, Young SE, Rhee SH. Subjective effects for alcohol, tobacco, and marijuana association with cross-drug outcomes. Drug Alcohol Depend. 2012 Jun; 123 Suppl 1:S52-8. PMID: 22445481; PMCID: PMC3729264.
    39. Palmer RH, Button TM, Rhee SH, Corley RP, Young SE, Stallings MC, Hopfer CJ, Hewitt JK. Genetic etiology of the common liability to drug dependence: evidence of common and specific mechanisms for DSM-IV dependence symptoms. Drug Alcohol Depend. 2012 Jun; 123 Suppl 1:S24-32. PMID: 22243758; PMCID: PMC3342475.
    40. Stephens SH, Hoft NR, Schlaepfer IR, Young SE, Corley RC, McQueen MB, Hopfer C, Crowley T, Stallings M, Hewitt J, Ehringer MA. Externalizing behaviors are associated with SNPs in the CHRNA5/CHRNA3/CHRNB4 gene cluster. Behav Genet. 2012 May; 42(3):402-14. PMID: 22042234; PMCID: PMC3506120.
    41. Haberstick BC, Ehringer MA, Lessem JM, Hopfer CJ, Hewitt JK. Dizziness and the genetic influences on subjective experiences to initial cigarette use. Addiction. 2011 Feb; 106(2):391-9. PMID: 20955488; PMCID: PMC3017238.
    42. Haberstick BC, Zeiger JS, Corley RP, Hopfer CJ, Stallings MC, Rhee SH, Hewitt JK. Common and drug-specific genetic influences on subjective effects to alcohol, tobacco and marijuana use. Addiction. 2011 Jan; 106(1):215-24. PMID: 20955487; PMCID: PMC3006038.
    43. Zeiger JS, Haberstick BC, Corley RP, Ehringer MA, Crowley TJ, Hewitt JK, Hopfer CJ, Stallings MC, Young SE, Rhee SH. Subjective effects to marijuana associated with marijuana use in community and clinical subjects. Drug Alcohol Depend. 2010 Jun 01; 109(1-3):161-6. PMID: 20149559; PMCID: PMC3000695.
    44. Haberstick BC, Lessem JM, McQueen MB, Boardman JD, Hopfer CJ, Smolen A, Hewitt JK. Stable genes and changing environments: body mass index across adolescence and young adulthood. Behav Genet. 2010 Jul; 40(4):495-504. PMID: 20087641; PMCID: PMC2989725.
    45. Schulz-Heik RJ, Rhee SH, Silvern LE, Haberstick BC, Hopfer C, Lessem JM, Hewitt JK. The association between conduct problems and maltreatment: testing genetic and environmental mediation. Behav Genet. 2010 May; 40(3):338-48. PMID: 20024671; PMCID: PMC3222931.
    46. Hartman CA, Hopfer CJ, Haberstick B, Rhee SH, Crowley TJ, Corley RP, Hewitt JK, Ehringer MA. The association between cannabinoid receptor 1 gene (CNR1) and cannabis dependence symptoms in adolescents and young adults. Drug Alcohol Depend. 2009 Sep 01; 104(1-2):11-6. PMID: 19443135; PMCID: PMC2769509.
    47. Jay Schulz-Heik R, Rhee SH, Silvern L, Lessem JM, Haberstick BC, Hopfer C, Hewitt JK. Investigation of genetically mediated child effects on maltreatment. Behav Genet. 2009 May; 39(3):265-76. PMID: 19283463; PMCID: PMC2693353.
    48. Palmer RH, Young SE, Hopfer CJ, Corley RP, Stallings MC, Crowley TJ, Hewitt JK. Developmental epidemiology of drug use and abuse in adolescence and young adulthood: Evidence of generalized risk. Drug Alcohol Depend. 2009 Jun 01; 102(1-3):78-87. PMID: 19250776; PMCID: PMC2746112.
    49. Gelhorn H, Hartman C, Sakai J, Mikulich-Gilbertson S, Stallings M, Young S, Rhee S, Corley R, Hewitt J, Hopfer C, Crowley T. An item response theory analysis of DSM-IV conduct disorder. J Am Acad Child Adolesc Psychiatry. 2009 Jan; 48(1):42-50. PMID: 19034046; PMCID: PMC2773289.
    50. Gelhorn H, Hartman C, Sakai J, Stallings M, Young S, Rhee SH, Corley R, Hewitt J, Hopfer C, Crowley T. Toward DSM-V: an item response theory analysis of the diagnostic process for DSM-IV alcohol abuse and dependence in adolescents. J Am Acad Child Adolesc Psychiatry. 2008 Nov; 47(11):1329-39. PMID: 18827724; PMCID: PMC2800944.
    51. Salomonsen-Sautel S, Van Leeuwen JM, Gilroy C, Boyle S, Malberg D, Hopfer C. Correlates of substance use among homeless youths in eight cities. Am J Addict. 2008 May-Jun; 17(3):224-34. PMID: 18464000.
      View in: PubMed
    52. Corley RP, Zeiger JS, Crowley T, Ehringer MA, Hewitt JK, Hopfer CJ, Lessem J, McQueen MB, Rhee SH, Smolen A, Stallings MC, Young SE, Krauter K. Association of candidate genes with antisocial drug dependence in adolescents. Drug Alcohol Depend. 2008 Jul 01; 96(1-2):90-8. PMID: 18384978; PMCID: PMC2574676.
    53. Hartman CA, Gelhorn H, Crowley TJ, Sakai JT, Stallings M, Young SE, Rhee SH, Corley R, Hewitt JK, Hopfer CJ. Item response theory analysis of DSM-IV cannabis abuse and dependence criteria in adolescents. J Am Acad Child Adolesc Psychiatry. 2008 Feb; 47(2):165-73. PMID: 18176333; PMCID: PMC2443687.
    54. Schlaepfer IR, Hoft NR, Collins AC, Corley RP, Hewitt JK, Hopfer CJ, Lessem JM, McQueen MB, Rhee SH, Ehringer MA. The CHRNA5/A3/B4 gene cluster variability as an important determinant of early alcohol and tobacco initiation in young adults. Biol Psychiatry. 2008 Jun 01; 63(11):1039-46. PMID: 18163978; PMCID: PMC2526976.
    55. Zeiger JS, Haberstick BC, Schlaepfer I, Collins AC, Corley RP, Crowley TJ, Hewitt JK, Hopfer CJ, Lessem J, McQueen MB, Rhee SH, Ehringer MA. The neuronal nicotinic receptor subunit genes (CHRNA6 and CHRNB3) are associated with subjective responses to tobacco. Hum Mol Genet. 2008 Mar 01; 17(5):724-34. PMID: 18055561.
      View in: PubMed
    56. Haberstick BC, Timberlake D, Hopfer CJ, Lessem JM, Ehringer MA, Hewitt JK. Genetic and environmental contributions to retrospectively reported DSM-IV childhood attention deficit hyperactivity disorder. Psychol Med. 2008 Jul; 38(7):1057-66. PMID: 17892623.
      View in: PubMed
    57. Sakai JT, Lessem JM, Haberstick BC, Hopfer CJ, Smolen A, Ehringer MA, Timberlake D, Hewitt JK. Case-control and within-family tests for association between 5HTTLPR and conduct problems in a longitudinal adolescent sample. Psychiatr Genet. 2007 Aug; 17(4):207-14. PMID: 17621163.
      View in: PubMed
    58. Ehringer MA, Clegg HV, Collins AC, Corley RP, Crowley T, Hewitt JK, Hopfer CJ, Krauter K, Lessem J, Rhee SH, Schlaepfer I, Smolen A, Stallings MC, Young SE, Zeiger JS. Association of the neuronal nicotinic receptor beta2 subunit gene (CHRNB2) with subjective responses to alcohol and nicotine. Am J Med Genet B Neuropsychiatr Genet. 2007 Jul 05; 144B(5):596-604. PMID: 17226798.
      View in: PubMed
    59. Schlaepfer IR, Clegg HV, Corley RP, Crowley TJ, Hewitt JK, Hopfer CJ, Krauter K, Lessem J, Rhee SH, Stallings MC, Wehner JM, Young SE, Ehringer MA. The human protein kinase C gamma gene (PRKCG) as a susceptibility locus for behavioral disinhibition. Addict Biol. 2007 Jun; 12(2):200-9. PMID: 17508994.
      View in: PubMed
    60. Haberstick BC, Timberlake D, Smolen A, Sakai JT, Hopfer CJ, Corley RP, Young SE, Stallings MC, Huizinga D, Menard S, Hartman C, Grotpeter J, Hewitt JK. Between- and within-family association test of the dopamine receptor D2 TaqIA polymorphism and alcohol abuse and dependence in a general population sample of adults. J Stud Alcohol Drugs. 2007 May; 68(3):362-70. PMID: 17446975; PMCID: PMC2507866.
    61. Timberlake DS, Hopfer CJ, Rhee SH, Friedman NP, Haberstick BC, Lessem JM, Hewitt JK. College attendance and its effect on drinking behaviors in a longitudinal study of adolescents. Alcohol Clin Exp Res. 2007 Jun; 31(6):1020-30. PMID: 17403064.
      View in: PubMed
    62. Haberstick BC, Timberlake D, Ehringer MA, Lessem JM, Hopfer CJ, Smolen A, Hewitt JK. Genes, time to first cigarette and nicotine dependence in a general population sample of young adults. Addiction. 2007 Apr; 102(4):655-65. PMID: 17309537.
      View in: PubMed
    63. Timberlake DS, Haberstick BC, Hopfer CJ, Bricker J, Sakai JT, Lessem JM, Hewitt JK. Progression from marijuana use to daily smoking and nicotine dependence in a national sample of U.S. adolescents. Drug Alcohol Depend. 2007 May 11; 88(2-3):272-81. PMID: 17174040.
      View in: PubMed
    64. Hopfer CJ, Lessem JM, Hartman CA, Stallings MC, Cherny SS, Corley RP, Hewitt JK, Krauter KS, Mikulich-Gilbertson SK, Rhee SH, Smolen A, Young SE, Crowley TJ. A genome-wide scan for loci influencing adolescent cannabis dependence symptoms: evidence for linkage on chromosomes 3 and 9. Drug Alcohol Depend. 2007 Jun 15; 89(1):34-41. PMID: 17169504; PMCID: PMC1892279.
    65. Hopfer CJ, Young SE, Purcell S, Crowley TJ, Stallings MC, Corley RP, Rhee SH, Smolen A, Krauter K, Hewitt JK, Ehringer MA. Cannabis receptor haplotype associated with fewer cannabis dependence symptoms in adolescents. Am J Med Genet B Neuropsychiatr Genet. 2006 Dec 05; 141B(8):895-901. PMID: 16917946; PMCID: PMC2564870.
    66. Sakai JT, Hopfer CJ, Hartman C, Haberstick BC, Smolen A, Corley RP, Stallings MC, Young SE, Timberlake D, Hewitt JK, Crowley TJ. Test of association between TaqIA A1 allele and alcohol use disorder phenotypes in a sample of adolescent patients with serious substance and behavioral problems. Drug Alcohol Depend. 2007 May 11; 88(2-3):130-7. PMID: 17069991.
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    67. Hartman CA, Lessem JM, Hopfer CJ, Crowley TJ, Stallings MC. The family transmission of adolescent alcohol abuse and dependence. J Stud Alcohol. 2006 Sep; 67(5):657-64. PMID: 16847533.
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    68. Hopfer C. Alcoholism: Study boosts evidence on linkage regions associated with alcoholism. Eur J Hum Genet. 2006 Dec; 14(12):1231-2. PMID: 16835588.
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    69. Lessem JM, Hopfer CJ, Haberstick BC, Timberlake D, Ehringer MA, Smolen A, Hewitt JK. Relationship between adolescent marijuana use and young adult illicit drug use. Behav Genet. 2006 Jul; 36(4):498-506. PMID: 16565887.
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    70. Van Leeuwen JM, Boyle S, Salomonsen-Sautel S, Baker DN, Garcia JT, Hoffman A, Hopfer CJ. Lesbian, gay, and bisexual homeless youth: an eight-city public health perspective. Child Welfare. 2006 Mar-Apr; 85(2):151-70. PMID: 16846110.
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    71. Timberlake DS, Haberstick BC, Lessem JM, Smolen A, Ehringer M, Hewitt JK, Hopfer C. An association between the DAT1 polymorphism and smoking behavior in young adults from the National Longitudinal Study of Adolescent Health. Health Psychol. 2006 Mar; 25(2):190-7. PMID: 16569110.
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    72. Timberlake DS, Rhee SH, Haberstick BC, Hopfer C, Ehringer M, Lessem JM, Smolen A, Hewitt JK. The moderating effects of religiosity on the genetic and environmental determinants of smoking initiation. Nicotine Tob Res. 2006 Feb; 8(1):123-33. PMID: 16497606.
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    73. Hopfer C, Mendelson B, Van Leeuwen JM, Kelly S, Hooks S. Club drug use among youths in treatment for substance abuse. Am J Addict. 2006 Jan-Feb; 15(1):94-9. PMID: 16449098.
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    74. Haberstick BC, Lessem JM, Hopfer CJ, Smolen A, Ehringer MA, Timberlake D, Hewitt JK. Monoamine oxidase A (MAOA) and antisocial behaviors in the presence of childhood and adolescent maltreatment. Am J Med Genet B Neuropsychiatr Genet. 2005 May 05; 135B(1):59-64. PMID: 15806601.
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    75. Hopfer CJ, Timberlake D, Haberstick B, Lessem JM, Ehringer MA, Smolen A, Hewitt JK. Genetic influences on quantity of alcohol consumed by adolescents and young adults. Drug Alcohol Depend. 2005 May 09; 78(2):187-93. PMID: 15845322.
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    76. Loo SK, Hopfer C, Teale PD, Reite ML. EEG correlates of methylphenidate response in ADHD: association with cognitive and behavioral measures. J Clin Neurophysiol. 2004 Nov-Dec; 21(6):457-64. PMID: 15622134.
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    77. Sakai JT, Stallings MC, Mikulich-Gilbertson SK, Corley RP, Young SE, Hopfer CJ, Crowley TJ. Mate similarity for substance dependence and antisocial personality disorder symptoms among parents of patients and controls. Drug Alcohol Depend. 2004 Aug 16; 75(2):165-75. PMID: 15276222.
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    78. Van Leeuwen JM, Hopfer C, Hooks S, White R, Petersen J, Pirkopf J. A snapshot of substance abuse among homeless and runaway youth in Denver, Colorado. J Community Health. 2004 Jun; 29(3):217-29. PMID: 15141897.
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    79. Loo SK, Specter E, Smolen A, Hopfer C, Teale PD, Reite ML. Functional effects of the DAT1 polymorphism on EEG measures in ADHD. J Am Acad Child Adolesc Psychiatry. 2003 Aug; 42(8):986-93. PMID: 12874502.
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    80. Hopfer CJ, Stallings MC, Hewitt JK, Crowley TJ. Family transmission of marijuana use, abuse, and dependence. J Am Acad Child Adolesc Psychiatry. 2003 Jul; 42(7):834-41. PMID: 12819443.
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    81. Hopfer CJ, Crowley TJ, Hewitt JK. Review of twin and adoption studies of adolescent substance use. J Am Acad Child Adolesc Psychiatry. 2003 Jun; 42(6):710-9. PMID: 12921479.
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    82. Hopfer CJ, Khuri E, Crowley TJ. Treating adolescent heroin use. J Am Acad Child Adolesc Psychiatry. 2003 May; 42(5):609-11. PMID: 12707565.
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    83. Hopfer CJ, Khuri E, Crowley TJ, Hooks S. Adolescent heroin use: a review of the descriptive and treatment literature. J Subst Abuse Treat. 2002 Oct; 23(3):231-37. PMID: 12392810.
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    84. Hopfer CJ, Stallings MC, Hewitt JK. Common genetic and environmental vulnerability for alcohol and tobacco use in a volunteer sample of older female twins. J Stud Alcohol. 2001 Nov; 62(6):717-23. PMID: 11838905.
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    85. Hopfer CJ, Mikulich SK, Crowley TJ. Heroin use among adolescents in treatment for substance use disorders. J Am Acad Child Adolesc Psychiatry. 2000 Oct; 39(10):1316-23. PMID: 11026188.
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    86. Mückter H, Islambouli S, Doklea E, Hopfer C, Szinicz L, Fichtl B, Forth W. Isolated rat kidney tubules as a screening system for arsenic antidotes. Toxicol Appl Pharmacol. 1993 Jul; 121(1):118-28. PMID: 8393218.
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    87. Renner G, Hopfer C. Metabolic studies on pentachlorophenol (PCP) in rats. Xenobiotica. 1990 Jun; 20(6):573-82. PMID: 2219952.
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