STELLA L. VOLPE, Ph.D., R.D., is an associate professor of nursing and the Miriam Stirl Term Professor in Nutrition at the University of Pennsylvania. Prior to her appointment at the University of Pennsylvania, she was an associate professor in the Department of Nutrition and director of the Center for Nutrition in Sport and Human Performance at the University of Massachusetts, Amherst. She received a Ph.D. in nutrition and an M.S. in exercise physiology from Virginia Polytechnic Institute and State University, and completed her dietetics curriculum at the University of Massachusetts. Dr. Volpe has published a number of research articles, reviews, and book chapters in her research areas of sports nutrition, mineral metabolism and exercise, weight loss, and body composition and has been invited to speak internationally and nationally on her research areas. Dr. Volpe is a fellow of the American College of Sports Medicine and a member of the American Society for Nutritional Sciences, the American Society of Clinical Nutrition, and the American Dietetic Association. Dr. Volpe was president of the New England American College of Sports Medicine from 2002 to 2003.

MYRON H. WEINBERGER, M.D., is a professor of medicine and director of the Hypertension Research Center at the Indiana University School of Medicine. He received his M.D. from the Indiana University School of Medicine and specializes in internal medicine and hypertension. In addition to serving on numerous scientific review committees, Dr. Weinberger is a member of several editorial boards, including those of Hypertension and Journal of the American College of Nutrition. He has published over 200 scientific articles on hypertension, many of which relate to the roles of sodium and/or potassium. Dr. Weinberger received the Robert Tigerstedt Award from the American Society of Hypertension and the Page-Bradley Lifetime Achievement Award from the Council for High Blood Pressure Research of the American Heart Association for his research in hypertension.

PAUL K. WHELTON, M.D., M.Sc., is Senior Vice President for Health Sciences at Tulane University and a professor both of epidemiology at the Tulane University School of Public Health and Tropical Medicine and of medicine at the Tulane University School of Medicine. He was previously dean of the School of Public Health and Tropical Medicine and of the School of Medicine, both at Tulane University. Prior to that, he was director of the Welch Center for Prevention, Epidemiology and Clinical Research; the Johns Hopkins Outpatient Clinical Research Center; and the Program in