Kenneth E. Calabrese, DO, MACOI, (certified internal medicine & nephrology, Tulsa, OK) is a 1970 graduate of the Kansas City College of Osteopathic Medicine and Surgery. After completing his rotating internship at Lakeside Hospital, he entered the internal medicine residency program at Oklahoma Osteopathic Hospital, now OSU Medical Center. In 1977, he completed a nephrology and hypertension fellowship at the Cleveland Clinic and returned to OSU Medical Center to begin his practice and develop end stage renal dialysis services for the hospital. A board-certified internist and nephrologist, Dr. Calabrese is a member of the American College of Osteopathic Internists Gillum Society of Master Fellows. Dr. Calabrese is currently the president of the Oklahoma Osteopathic Association.