Dr. Gregory S. Merrick, M.D. Gregory S. Merrick, M.D. is the Executive Director of the Urologic Research Institute. Dr. Merrick is a nationally recognized prostate cancer expert. He also serves as the Director of the Schiffler Cancer Center at Wheeling Hospital in Wheeling, West Virginia as well as an Associate Professor of Physics at Wheeling Jesuit University. Dr. Merrick is President of the American Brachytherapy Society. He is the Prostate Section Editor of the journal Brachytherapy and serves as a manuscript reviewer for numerous other peer-reviewed scientific oncologic and urologic journals. Dr. Merrick has published in excess of 250 original scientific publications and 80 scientific abstracts, as well as contributing to and/or editing multiple medical textbooks. In conjunction with Dr. Kent E. Wallner of the University of Washington, Dr. Merrick has recently completed the only two large prospective randomized prostate brachytherapy trials ever conducted.