1. University Hospital Zurich, Dept of Reproductive Endocrinology, Frauenklinikstrasse 10, Zurich, Switzerland
2. University Women’s Hospital, Division of Gynecological Endocrinology and Reproductive Medicines, Effingerstrasse 102, Bern, Switzerland
3. Charité Berlin, Dept of Psychosomatics, Sauerbruchweg 5, Berlin, Germany
4. University Hospital Graz, Dept of Gynecology and Obstetrics, Auenbruggerplatz 1, Graz, Austria
5. Canton Hospital St. Gallen, Dept of Gynecology and Obstetrics, St. Gallen, Rorschacherstrasse 501, St. Gallen, Switzerland
6. Triemli Hospital Zurich, Dept of Gynecology and Obstetrics, Birmesdorferstrasse 497, Zurich, Switzerland
7. Canton Hospital Schaffhausen, Dept of Gynecology and Obstetrics, Geissbergstrasse 81, Schaffhausen, Switzerland
8. University Hospital Zurich, Dept of Gynecology, Frauenklinikstrasse 10, Zurich, Switzerland