1. Department of Gynecology, Obstetrics and Reproductive Medicine, University Medical School of Saarland, 66421 Homburg/Saar, Germany
2. Department of Neurology, University Medical School of Saarland, 66421 Homburg/Saar, Germany
3. Department of Gynecology, University Medical Center Freiburg, 79106 Freiburg, Germany
4. Department of Diagnostic and Interventional Neuroradiology, University Medical School of Saarland, 66421 Homburg/Saar, Germany