1 Department of Obstetrics and Gynecology, Helios Dr. Horst-Schmidt-Kliniken Wiesbaden (Drs. Eichbaum, Asrar). Electronic address: michael.eichbaum@helios-gesundheit.de.
2 Department of General Surgery, Helios Dr. Horst-Schmidt-Kliniken Wiesbaden (Dr. Mitsiev).
3 Department of Obstetrics and Gynecology, University of Essen Medical School (Dr. Kimmig).
4 Department of Obstetrics and Gynecology, University of Frankfurt Medical School (Dr. Eichbaum), Wiesbaden, Germany.
5 Department of Obstetrics and Gynecology, Helios Dr. Horst-Schmidt-Kliniken Wiesbaden (Drs. Eichbaum, Asrar).