1. Department of Urology, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
2. Department of Urology, Tampere University Hospital, Tampere, Finland
3. Faculty of Medicine and Life Sciences, University of Tampere, Tampere, Finland
4. Centre for Military Medicine, The Finnish Defense Forces, Riihimäki, Finland
5. Department of Surgery, Kotka Central Hospital, Kotka, Finland
6. Pihlajalinna Koskiklinikka, Tampere, Finland
7. Terveystalo Tampere, Tampere, Finland
8. Department of Urology, Oulu University Hospital, Oulu, Finland
9. Department of Urology, Turku University Hospital, Turku, Finland
10. Tampere University Hospital, Tampere, Finland