Elson M. Haas, MD has been in medical practice for over 25 years and was instrumental in the development of the field that he has termed Integrated Medicine. He is the founder and director of the Preventive Medical Center of Marin, an integrated health care facility in San Rafael, California, where he specializes in Family and Nutritional Medicine, Detoxification, and Individualized Health Programs. His books include: Staying Healthy with Nutrition , Staying Healthy with the Seasons (fully revised 20th Anniversary 2003 edition), The False Fat Diet, The Staying Healthy Shopper's Guide, The Detox Diet, and A Cookbook for All Seasons.