1. Division of Gynaecological Endocrinology and Reproductive Medicine Department of Gynaecology and Obstetrics Bern University Hospital University of Bern Inselspital Bern Switzerland
2. Medical Faculty University of Bern Bern Switzerland
3. Department of Internal Medicine Nidwalden Luzerner Kantonsspital and University of Zurich Stans Switzerland
4. Graduate School for Health Sciences University of Bern Bern Switzerland
5. Department of Obstetrics and Gynaecology Bern University Hospital University of Bern Inselspital Bern Switzerland
6. Department of Paediatric Surgery Bern University Hospital University of Bern Inselspital Bern Switzerland
7. Swiss Tropical and Public Health Institute Basel Switzerland
8. University of Basel Basel Switzerland
9. Division of Reproductive Medicine Luzerner Kantonsspital Frauenklinik University of Zurich Lucerne Switzerland