An unselected general population sample of 147 individuals was also recruited to assess phenotype base rates. Letters were sent to residents of the same geographical areas as the family samples, requesting participation in a study on “health behaviors and characteristics” to avoid a sample biased toward participation in a study on alcoholism. No inclusion/exclusion criteria were applied aside from the ability to respond to the telephone interview and complete the questionnaires. The details of recruitment of all participants have been previously published [see Seaton et al., 2004; Veiten et al., 2004].
