Noreen M. Clark is dean of the School of Public Health and Marshall H. Becker professor of public health at the University of Michigan. Her research specialty concerns the social and behavioral aspects of chronic disease management. She uses asthma and heart disease as models to explore elements of self-regulation, including a patient’s ability to observe, judge, and react appropriately to his or her own efforts to manage disease. She has also conducted large-scale trials of behavioral and educational interventions in clinical and community settings aimed at improving disease management by patients, families, and health care providers. She serves as national program director for the Robert Wood Johnson Foundation Allies Against Asthma Program. She is a member of the Institute of Medicine, former president of the Society for Public Health Education, and former editor of Health Education and Behavior. She has a Ph.D. from Columbia University.

Mark J. Eitelberg is professor of public policy at the Naval Postgraduate School. Recently, he was a visiting research collaborator with the Office of Population Research, Woodrow Wilson School of Public and International Affairs, Princeton University. He is former editor of the journal, Armed Forces & Society. He has worked with a number of agencies, commissions, and private organizations, including the Human Resources Research Organization (as senior scientist for eight years), the Brookings Institution, the Rand Corporation, the Technical Cooperation Program (an international consortium of defense scientists), and the National Research Council’s Committee on Techniques for the Enhancement of Human Performance, among others. An author and editor of numerous publications, he is editing a four-book set, Americans in Arms. He has M.P.A. and Ph.D. degrees from the Wagner School of Public Service at New York University.

Barbara C. Hansen is professor of internal medicine and director of the Obesity, Diabetes and Aging Research Center at the College of Medicine of the University of South Florida. Her work focuses on the relationships between overweight and diabetes, examining their causes from the perspective of defective conditions in the body, its cells, and even its molecules. For more than a dozen years, her research group has been conducting a study to see if a weight control regimen can prevent middle-age diabetes and extend life span. A member of the Institute of Medicine, she has served as an adviser and consultant to many other leading scientific societies and organizations, including the National Institutes of Health, the Robert Wood Johnson Foundation, and the National Institute for Environmental Health Sciences. She has authored numerous scientific