Ronald Bayer is a Professor of sociomedical sciences at the Joseph L. Mailman School of Public Health at Columbia University. His work focuses on ethical issues and public health policy, specifically centered on AIDS, as well as tuberculosis policy and tobacco regulations in liberal democracies. Prior to Columbia, Dr. Bayer was Associate for policy studies at The Hastings Center, a research center focused on medical ethics. Dr. Bayer received his Ph.D. at the University of Chicago. He is a member of the Institute of Medicine and serves on the Institute of Medicine’s Board on Health Promotion and Disease Prevention. He has participated in the Institute of Medicine’s Committee on Immunization Safety Review and the committee on the Ryan White CARE Act: Data for Allocation, Planning and Evaluation. In the past, he was a member of the Institute’s Committee on the Elimination of Tuberculosis in the United States.

R. Alta Charo is Associate Dean of the University of Wisconsin Law School, and Professor of law and bioethics at the University of Wisconsin’s law and medical schools. She offers courses on health law, bioethics and biotechnology law, food and drug law, medical ethics, reproductive rights, torts, and legislative drafting. In addition, she sits on the University’s internal bioethics advisory committee and its Institutional Review Board for the protection of human subjects in medical research. Ms. Charo serves on the editorial boards of the Journal of Law, Medicine, and Ethics; Cloning: Science and Policy; and the Monash Bioethics Review. Ms. Charo received her law degree from Columbia University School of Law and was a member of the steering committee that founded the International Association for Bioethics. From 1996 to 2001 she served on the National Bioethics Advisory Commission, and she currently serves on the National Academy of Sciences’ Board on Life Sciences.

Thomas Coates is Professor of infectious diseases at the David Geffen School of Medicine, University of California, Los Angeles. He was formerly Director and Principal Investigator of Center for AIDS Prevention Studies, Professor of medicine and Director of the behavioral medicine unit at University of California, San Francisco (UCSF), and Executive Director of the AIDS Research Institute at UCSF. Dr. Coates came to UCSF from Johns Hopkins in 1982. Before that, he was on the faculty of the Stanford Heart Disease Prevention program. His interests and experience focus on the study of disease-related behavior, with an emphasis on interventions to modify behaviors. He is the author of many publications on the effects of antibody testing on high-risk behavior, the efficacy of strategies to modify high-risk behavior, the relationship between psychosocial variables and AIDS-related immune dysfunction, and clinical illness and interventions to reduce high-risk behaviors among seropositive men. Dr. Coates has con-