Dr. Janson is past-president of both the American College for Advancement in Medicine and the American Preventive Medical Association, and he founded and directed the first complementary-alternative medical center in New England, in Cambridge, Massachusetts in 1976. He is one of the best-known holistic physicians in the country. In 1990, Dr. Janson founded the Center for Preventive Medicine, in Barnstable, on Cape Cod in Massachusetts, and directed it until 1999. He now consults with patients in Arlington, Massachusetts and New Smyrna Beach, Florida, providing counseling in nutrition, dietary supplements, exercise, stress management, wellness, personal growth, chelation therapy, and intravenous nutritional therapies. Dr. Janson has a unique background with training in both conventional western medicine and alternative therapies.