Arizona Research Center We are a free-standing, independent clinical research organization. Founded by board-certified orthopedic surgeon Joseph S. Gimbel, M.D., in 1997, the organization has grown to become one of the state’s leading research organizations. Experienced investigators are on our staff, all of whom maintain a private practice in addition to their integral role with the research studies. We are affiliated with the John C. Lincoln Health Care Network, one of Phoenix’s largest and most-respected health care providers.