1. Departments of Obstetrics and Gynecology, and Molecular Neurochemistry, University of Bochum, Bochum, Germany
2. Departments of Obstetrics and Gynecology, and Molecular Neurochemistry, University of Bochum, Bochum, Germany; Universitäts-frauenklinik, Knappschaftskrankenhaus, In der Schornau 23 - 25, D-44892, Bochum, Germany;