Parental concordance and comorbidity for psychiatric disorder and associate risks for current psychiatric symptoms and disorders in a community sample of juvenile twins.
Foley DL, Pickles A, Simonoff E, Maes HH, Silberg JL, Hewitt JK, Eaves LJ. Parental concordance and comorbidity for psychiatric disorder and associate risks for current psychiatric symptoms and disorders in a community sample of juvenile twins. J Child Psychol Psychiatry. 2001 Mar; 42(3):381-94.