1. Department of Gynecology and Obstetrics, University Hospital Schleswig-Holstein, Campus Lübeck, Lübeck
2. Breast Unit, Helios University Clinic Witten/Herdecke, Wuppertal
3. Department of Gynecology and Gynecological Oncology, Breast Center, AGAPLESION Markus Hospital, Frankfurt/M.
4. Department of Gynecology and Obstetrics, University Hospital Schleswig-Holstein, Campus Lübeck, Lübeck, Germany