Robert F. Kushner is professor of medicine at Northwestern University Feinberg School of Medicine, clinical director of the Northwestern Comprehensive Center on Obesity, and medical director of the Center for Lifestyle Medicine in Chicago. He received his MD from the University of Illinois and a master's degree in clinical nutrition and nutritional biology from The University of Chicago. He is past president of The Obesity Society, the American Society for Parenteral and Enteral Nutrition, and the American Board of Physician Nutrition Specialists, and current chair of the American Board of Obesity Medicine. Dr. Kushner has authored more than 190 original articles, reviews, books, and book chapters covering medical nutrition, medical nutrition education, and obesity.
Christopher D. Still is medical director of the Center for Nutrition and Weight Management and the Geisinger Obesity Research Institute. He earned his MS from Columbia University's Institute of Human Nutrition and his DO from the Philadelphia College of Osteopathic Medicine. He has been past president of the American Board of Physician Nutrition Specialists and founding board member of the Obesity Action Coalition. In addition to his strong interest in obesity research, he has authored numerous clinical and research-oriented publications in the field of obesity and obesity-related comorbid medical problems.