1. Department of Gynecology and Obstetrics, University of Lübeck and University Medical Center Schleswig‑Holstein, Campus Lübeck, D‑23538 Lübeck, Germany
2. Institute of Pathology, University of Lübeck and University Medical Center Schleswig‑Holstein, Campus Lübeck, D‑23538 Lübeck, Germany
3. Department of Gynecology and Obstetrics, Evangelisches Krankenhaus Bethel, D‑33617 Bielefeld, Germany