1. Cleveland Clinic Department of Radiation Oncology, 9500 Euclid Avenue, Cleveland, OH 44195, USA
2. Cleveland Clinic GlickmanUrological and Kidney Institute, 9500 Euclid Avenue, Cleveland, OH 44195, USA
3. UCLA Jonsson Comprehensive Cancer Center, 200 UCLA Medical Plaza, Suite B265, Los Angeles, CA 90095-6951, USA
4. Department of Urology, Kaiser Permanente, Ohio, 12301 Snow Road, Parma, OH 44130, USA