1. Departments of Surgery (Section of Urology) and Medicine (Section of Hematology/Oncology), Norris Cotton Cancer Center, Lebanon, New Hampshire; Department of Urological Surgery, University of Pittsburgh School of Medicine, Pittsburgh and Department of Clinical Research (Section of Oncology), Sterling Winthrop Inc., Collegeville, Pennsylvania; Division of Urology, Walter Reed Army Medical Center, Washington, D. C., and University of Wisconsin Medical School, Madison, Wisconsin.