From the Division of Urology, Washington University Medical Center and the John Cochran Veterans Administration Hospital, St. Louis, Missouri
Accepted for publication August 31, 1981.
Supported in part by a Biomedical Research Grant 3375 51054B from the Washington University School of Medicine, a Young Investigator Research Award 1R23AM 29831-01 from the NIAMDD and a Veteran's Administration Research Grant.
*Requests for reprints: Division of Urology, Washington University Medical Center, St. Louis, Missouri 63110.
