1. Clinic for Gynecology, Charité Universitätsmedizin Berlin, Campus Benjamin Franklin, Berlin, Germany
2. Department of Obstetrics and Gynecology, Faculty of Medicine, University of Sao Paulo, Sao Paulo, Brazil
3. Institute of Pathology, Charité Universitätsmedizin Berlin, Campus Mitte, Berlin, Germany
4. Department of Gynecology, Asklepios Klinik Harburg, Hamburg, Germany