1. From the Washington University (GA), St. Louis, St. Louis, Missouri, Bostwick Laboratories (DB), Richmond, Virginia, Cedars Medical Center (FC), Miami, Florida, The Brady Urological Institute, The Johns Hopkins Medical Institutions (JE), Baltimore, Maryland, University of Colorado Health Sciences Center (MSL), Denver, Colorado, and University of Texas Southwestern Medical Center at Dallas (JM, CGR), Dallas, Texas