1. Squier Urological Clinic, Columbia University College of Physicians and Surgeons, New York, NY
2. Departments of Urology, Columbia-Presbyterian Medical Center, New York, NY
3. Department of Biostatistics, School of Public Health, Columbia University, New York, NY
4. Radiation Oncology, Columbia-Presbyterian Medical Center, New York, NY
5. University of Michigan Department of Pathology and Section of Urology, Ann Arbor