1. Department of Gynecology and Obstetrics, Marienhospital Herne, Ruhr-University, Bochum, Germany
2. Department of Gynecology and Obstetrics, Marienhospital Herne, Ruhr-University, Bochum, Germany; Chairman of Obstetrics and Gynecology, Klinkum Fulda, Pacellillee 4, 36043 Fulda, Germany