1. German Breast Group; Neu-Isenburg Germany
2. Department of Gynecology and Obstetrics; University Hospital Frankfurt; Frankfurt Germany
3. Elisabeth Hospital; Kassel Germany
4. Department Obstetrics and Gynecology; Sudstadt Clinic; Rostock Germany
5. Study Centre Oncology; Ravensburg Germany
6. Department of Gynecology and Obstetrics; University Hospital Kiel; Kiel Germany
7. Interdisciplinary Centre Munich; Munich Germany
8. Department of Obstetrics and Gynecology; Marienhospital; Witten Germany
9. Department of Obstetrics and Gynecology; Hoechst Clinic; Frankfurt Germany
10. University Women's Hospital; Heidelberg Germany
11. Department of Obstetrics and Gynecology; Ev. Waldkrankenhaus Hospital; Berlin Germany
12. University Women's Hospital; Freiburg Germany
13. Department of Obstetrics and Gynecology; Kreiskrankenhaus Torgau; Torgau Germany
14. University Women's Hospital; Halle Germany
15. University Women's Hospital; Ulm Germany
16. Berlin Charity Hospital, Institute of Pathology; Berlin Germany
17. Institute of Pathology Kaufbeuren-Ravensburg; Germany
18. Department of Gynecology Obstetrics and Gynecology; Sana Clinic; Offenbach Germany