[1] Univ British Columbia, Dept Psychiat, Vancouver, BC, Canada
[2] Univ British Columbia, Dept Obstet & Gynaecol, Vancouver, BC, Canada
[3] Univ Hosp Cleveland, Dept Urol, Cleveland, OH USA
[4] Monash Univ, Dept Epidemiol & Prevent Med, Melbourne, Vic 3004, Australia
[5] Univ Hosp, Sexol Unit, Uppsala, Sweden
[6] Boston Univ, Sch Med, Inst Sexual Med, Boston, MA 02118 USA
[7] Univ Med & Dent New Jersey, Dept Psychiat, New Brunswick, NJ USA
[8] Univ Texas, Dept Psychol, Austin, TX 78712 USA
[9] Univ Copenhagen, Panum Inst, Dept Med Physiol, DK-2200 Copenhagen N, Denmark