1. Department of Urology, Helsinki University Hospital, Helsinki, Finland;
2. Department of Urology, Sahlgrenska University Hospital, Gothenburg, Sweden;
3. Department of Urology, Landspitali University Hospital, Reykjavik, Iceland;
4. Department of Urology, Herlev University Hospital, Copenhagen, Denmark;
5. Department of Surgical and Perioperative Sciences, Urology and Andrology, Umeå University, Umeå, Sweden;
6. Department of Urology, Odense University Hospital, Odense, Denmark;
7. Clinical Institute, Southern University of Denmark, Odense, Denmark;
8. Department of Urology, Akershus University Hospital, Lörenskog, Norway;
9. Department of Urology, Faculty of Medicine and Health, Örebro University, Örebro, Sweden;
10. Department of Urology, Haukeland University Hospital, Bergen, Norway;
11. Department of Clinical Medicine, University of Bergen, Bergen, Norway