1. Department of Obstetrics and Gynecology, University Hospital, LMU Munich, Munich, Germany.
2. Munich Cancer Registry, Bavarian Cancer Registry - Regional Centre Munich (LGL) at the University Hospital of Munich, Institute for Medical Information Processing, Biometry and Epidemiology, LMU Munich, Munich, Germany.
3. Charité Universitaetsmedizin Berlin, Department of Gynecology, Campus Virchow Klinikum, Berlin, Germany.
4. Praxisklinik Krebsheilkunde, Berlin, Germany.
5. Department of Gynecology and Obstetrics, Medical Faculty and University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany.