1. Department of Obstetrics and Gynecology, University Hospital of Münster, Münster, Germany.
2. Centre for Clinical Trials Münster, University of Münster, Münster, Germany.
3. Institute of Biostatistics and Clinical Research, and University of Münster, Münster, Germany.
4. Institute of Medical Informatics, University of Münster, Münster, Germany.
5. Office for eHealth, University Hospital Münster, Münster, Germany.