1. Sheffield Teaching Hospitals NHS Foundation Trust; Sheffield United Kingdom
2. Pittsburgh University; Pittsburgh Pennsylvania
3. Vanderbilt University Medical Center; Nashville Tennessee
4. University of Bristol and Bristol Urological Institute; Bristol United Kingdom
5. Maastricht University Medical Center; Maastricht Netherlands
6. New York University; New York New York
7. St. Antonius Hospital; Gronau Germany
8. University of Connecticut; Farmington Connecticut
9. Nihon University; Koriyama Japan
10. University of Philadelphia; Philadelphia Pennsylvania
11. Bristol Urological Institute; Bristol United Kingdom