Subjects were recruited and assessed using the Semi-Structured Assessment for the Genetics of Alcoholism (SSAGA; Bucholz et al., 1994), the Timeline Followback interview for habitual drinking (TFLB; Sobell et al., 1986), and the Alcohol Use Disorders Identification Test (AUDIT; Saunders et al., 1993). The sample reported here includes subjects studied in Kareken, et al. (2010), except for three subjects whose blood samples were unavailable for genotyping. Also included were 14 social drinkers and four subjects whose SSAGA responses satisfied DSM-IV criteria for alcohol dependence (drinks/week, range 14-32 for these latter four subjects). None of the subjects in this study were undergoing treatment for substance abuse/dependence, and none expressed any interest in such treatment at the time of study.