1. Department of Obstetrics and Gynecology, University Hospital Schleswig-Holstein, Kiel, Germany
2. Dental Surgery, Dr. Uta Goldmann, Gütersloh, Germany
3. Breast Cancer Screening Unit Bielefeld-Gütersloh, Bielefeld, Germany
4. Department of Obstetrics and Gynecology, Hannover Medical School, Hannover, Germany
5. Department of Obstetrics and Gynecology, Klinikum Bielefeld, Bielefeld, Germany