with alcoholism, collected DNA and family relationships, and conducted linkage and association analyses with the goal of identifying the genes associated with alcohol dependence (see Long et al., 1998; Reich et al., 1998; Ehlers et al., 2004; Hill et al., 2004; Vieten et al., 2004; Wilhelmsen et al., 2005; Dick and Bierut, 2006; Edenberg and Foroud, 2006; Prescott et al., 2006).