[1] Urol Off, D-20354 Hamburg, Germany
[2] Assoc Etud Path Appareil Reprod & Psychosomat, Lille, France
[3] Acad Zichenhuis, Dept Urol, Nijmegen, Netherlands
[4] Inst Clin & Expt Med, Prague, Czech Republic
[5] Univ Copenhagen, Panum Inst, Dept Physiol, DK-2200 Copenhagen, Denmark