1. Roswell Park Comprehensive Cancer Center, Buffalo, New York, USA.
2. UKS Saarland, Homburg, Germany.
3. Rijnstate Hospital-Stichting, Arnhem, the Netherlands.
4. Department of Urology, Karolinska Institute, Stockholm, Sweden.
5. Guy's Hospital, London, United Kingdom.
6. Wake Forest Medical Center, Winston-Salem, North Carolina, USA.
7. Department of Urology, Washington University in St. Louis, Missouri, USA.
8. Beth Israel Deaconess Medical Center, Boston, Massachusetts, USA.
9. Luigi Sacco (San Raffaele Turro), Milan, Italy.
10. Yonsei Medical Health Care System, Severance Hospital, Seoul, South Korea.
11. Metro Health Hospital, Wyoming, Michigan, USA.
12. Koç University Hospital, Istanbul, Turkey.