1. Department of Urology, Karolinska Hospital, Stockholm, Sweden
2. Department of Urology, Kuopio University Hospital, Kuopio, Finland
3. Department of Urology, Uppsala Academic Hospital, Uppsala, Sweden
4. Department of Urology, Sahlgrens University Hospital, Gothenburg, Sweden
5. Department of Urology, Oncologic Center, Umea˚University, Umea˚, Sweden
6. Department of Cardiology, Huddinge Hospital, Huddinge, Sweden
7. Diakonissehjemmet Hospital, Bergen, Norway
8. Department of Medicine, Huddinge Hospital, Huddinge, Sweden
9. Department of Urology, Rigshospitalet, Copenhagen, Denmark, 10Research Laboratory for Reproductive Health, Karolinska Hospital, Stockholm, Sweden and the Departments of Urology, 11Herlev University Hospital, Herlev, Denmark, 12Helsinki University Hospital, Helsinki, Finland, 13Stavanger Hospital, Stavanger, Norway and 14Norrköping Hospital, Norrköping, Sweden
10. Research Laboratory for Reproductive Health, Karolinska Hospital, Stockholm, Sweden
11. Department of Urology, Herlev University Hospital, Denmark
12. Department of Urology, Helsinki University Hospital, Helsinki, Finland
13. Department of Urology, Stavanger Hospital, Stavanger, Norway
14. Department of Urology, Norrköping, Sweden