1. Department of Obstetrics and Gynecology, Johannes Gutenberg University, Mainz, Germany;
2. Institute for Pathophysiology, Johannes Gutenberg University, Mainz, Germany;
3. Institute of Pathology, Johannes Gutenberg University, Mainz, Germany;
4. Institute of Medical Biostatistics, Epidemiology and Informatics, Johannes Gutenberg University, Mainz, Germany;