1. Department of Urology, Freeman Hospital, Newcastle Upon Tyne, UK
2. Sant ‘Andrea Hospital, Sapienza University, Rome, Italy
3. Division of Gastroenterology & Cochrane UGPD Group, Department of Medicine, Health Sciences Center, McMaster University, Hamilton, Ontario, Canada
4. Department of Urology, Connolly Hospital, Blanchardstown, Dublin, Ireland
5. Department of Urology, National and Kapodistrian University of Athens, Sismanogleio Hospital, Athens, Greece
6. Department of Urology, First Faculty of Medicine, Charles University in Prague, Prague, Czech Republic
7. Department of Urology, University of Southern Denmark, Odense, Denmark
8. Division of Nephrology and Dialysis, Department of Medicine, University of Verona, Verona, Italy
9. Department of Urology, University Hospital of Ghent, Ghent, Belgium
10. Department of Urology, Bruederkrankenhaus Trier, Johannes Gutenberg University Mainz, Trier, Germany
11. Department of Urology, University Hospital Southampton NHS Foundation Trust, Southampton, UK