1. Center for Surgery and Public Health and Division of Urologic Surgery; Harvard Medical School; Brigham and Women's Hospital; Boston Massachusetts USA
2. Department of Urology; University Medical Center Hamburg-Eppendorf; Hamburg Germany
3. Department of Urology; Marien Hospital; Ruhr-University Bochum; Herne Germany
4. Department of Medicine; Mayo Clinic; Rochester Minnesota USA
5. Department of Radiation Oncology; Dana-Farber Cancer Institute; Brigham and Women's Hospital; Harvard Medical School; Boston Massachusetts USA