1. Department of Urology, Case Western Reserve University, Cleveland, Ohio
2. Glickman Urological and Kidney Institute, Cleveland Clinic, Cleveland, Ohio
3. Department of Urology, Eberhard-Karls-University Tuebingen, Tuebingen, Germany
4. Department of Biomedical Engineering, Cleveland Clinic, Cleveland, Ohio
5. Research Service, Louis Stokes Cleveland Veterans Affairs Medical Center, Cleveland, Ohio