1 Center for Studies of Addiction, Department of Psychiatry, Perelman School of Medicine, University of Pennsylvania, Philadelphia (Kranzler, Kember); Mental Illness Research, Education, and Clinical Center, Veterans Integrated Service Network 4, Crescenz Veterans Affairs Medical Center, Philadelphia (Kranzler, Kember); Department of Psychiatry, Yale School of Medicine, New Haven, Conn., and Veterans Affairs Connecticut Healthcare System, West Haven, Conn. (Zhou).