[1] Univ Hosp Tuebingen, Dept Gynecol & Obstet, Calwerstr 7, D-72076 Tubingen, Germany
[2] Cantonal Hosp St Gallen, Dept Urol, Rorschacher Str 95, CH-9000 St Gallen, Switzerland
[3] Diakonie Klinikum Schwaeb Hall, Dept Gynecol & Obstet, Diakoniestr 10, D-74523 Schwaebisch Hall, Germany