1. Division of Obstetrics and Feto‐Maternal Medicine Department of Obstetrics and Gynecology Medical University of Vienna Vienna Austria
2. Klinikum Bielefeld Rosenhohe Department of Dermatology and Allergology Bielefeld Germany
3. Frauenklinik Kantonspital Baselland Liestal Switzerland
4. Labor Dr. Limbach und Kollegen Heidelberg Germany
5. Facharzt für Dermatologie und Allergologie Biebertal Germany
6. Department of Hematology, Oncology and Palliative Medicine Helios Hospital Aue Aue Germany
7. Department of Dermatology University Hospital Tuebingen Tuebingen Germany
8. Facharzt für Frauenheilkunde und Geburtshilfe Berlin Germany
9. Department of Laboratory Medicine Division of Clinical Microbiology Medical University of Vienna Vienna Austria
10. Deutsches Zentrum fuer Infektionen in Gynaekologie und Geburtshilfe Wuppertal Germany