1. Friedrich-Schiller-University, CMB, Institute for Biochemistry, Hans-Knöll-Straße 2, 07745 Jena, Germany
2. Eberhard-Karls-University, Department of Gynecology, Calwer Straße 7, 72076 Tübingen, Germany
3. Department of Obstetrics and Gynecology, Medical School, Goethe-University, Theodor-Stern-Kai 7, 60590 Frankfurt am Main, Germany