to circadian time, and across drinking sessions. Finally, the need for measuring BECs in all studies was emphasized (Leeman et al. 2010). Although alcohol consumption is only one area of importance for understanding and treating alcohol use disorders, it is one where the field of alcohol research offers a strong opportunity for clinical and preclinical approaches to find common ground in genetics. The genetics traditions at both levels of investigation are strongly historically based, and the target population that would benefit from biomedical progress is very large.