1. Department of Gynaecology and Obstetrics, Erlangen University Hospital, Friedrich-Alexander University Erlangen-Nürnberg, Erlangen, Germany
2. Department for Womenʼs Health, University Hospital of Tübingen, Tübingen, Germany
3. Institute of Medical Microbiology and Virology, University Medical Centre Göttingen, Göttingen, Germany
4. Laboratory Prof. Gisela Enders and Colleagues, Stuttgart, Germany