Externalizing behaviors are associated with SNPs in the CHRNA5/CHRNA3/CHRNB4 gene cluster.
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.