1. Department of Gynecology, Charité – Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany
2. Department for Gynecology, Vivantes Klinikum Neukölln, Berlin, Germany
3. Department for Obstetrics and Gynecology, AVK Vivantes, Berlin, Germany
4. Department for Obstetrics and Gynecology, Vivantes Klinikum Friedrichshain, Berlin, Germany
5. Department for Obstetrics and Gynecology, Vivantes Klinikum am Urban, Berlin, Germany
6. Department for Gynecology, Vivantes Klinikum Kaulsdorf, Berlin, Germany
7. Department for Gynecology, Vivantes Humboldt-Klinikum, Berlin, Germany
8. Central Institute of Laboratory Medicine, DRK Kliniken Berlin, Berlin, Germany
9. Institute of Laboratory Medicine, Clinical Chemistry and Pathobiochemistry, Charité – Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany