1 Institute of Clinical Medicine, University of Oslo, Oslo, Norway; Department of Urology, Oslo University Hospital, Oslo, Norway; Institute of Clinical Medicine, University of Aarhus, Aarhus, Denmark. Electronic address: tebj@medisin.uio.no.
2 Institute of Clinical Medicine, University of Oslo, Oslo, Norway; Department of Urology, Santa Chiara Regional Hospital, Trento, Italy.
3 Division for Mental and Physical Health, National Institute of Public Health, Oslo, Norway.