1 David J. K. Balfour is retired from the Division of Systems Medicine, School of Medicine, University of Dundee, Dundee, UK. Neal L. Benowitz is with the Department of Medicine, School of Medicine, University of California, San Francisco. Suzanne M. Colby is with the Department of Psychiatry and Human Behavior, Alpert Medical School, Brown University, Providence, RI. Dorothy K. Hatsukami is with the Department of Psychiatry and Behavioral Sciences, Medical School, University of Minnesota, Minneapolis. Harry A. Lando is with the Division of Epidemiology and Community Health, School of Public Health, University of Minnesota, Minneapolis. Scott J. Leischow is with the College of Health Solutions, Arizona State University, Phoenix. Caryn Lerman is with the Norris Comprehensive Cancer Center, Keck School of Medicine, University of Southern California, Los Angeles. Robin J. Mermelstein is with the Department of Psychology, University of Illinois-Chicago. Raymond Niaura is with the Department of Epidemiology, School of Global Public Health, New York University, New York, NY. Kenneth A. Perkins is with the Department of Psychiatry, School of Medicine, University of Pittsburgh, Pittsburgh, PA. Ovide F. Pomerleau is with the Department of Psychiatry, Medical School, University of Michigan, Ann Arbor. Nancy A. Rigotti is with the Department of Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, MA. Gary E. Swan is with the Stanford Prevention Research Center, Department of Medicine, Stanford University School of Medicine, Palo Alto, CA. Kenneth E. Warner is with the Department of Health Management and Policy, School of Public Health, University of Michigan, Ann Arbor. Robert West is with the Department of Behavioural Science and Health, University College London, London, UK.