1. Department of Obstetrics and Gynecology, Turku University Hospital, University of Turku, 20520 Turku, Finland
2. Department of Obstetrics and Gynecology, Vaasa Central Hospital, 65130 Vaasa, Finland
3. Département de Microbiologie et d’Immunologie et Centre de Recherche du Centre Hospitalier de l’Université de Montréal (CHUM), Montreal, QC H2X 0A9, Canada
4. Department of Microbiology, Infectious Diseases and Immunology, University of Montreal, Montreal, QC H3T 1J4, Canada
5. Department of Clinical Research, Biohit Oyj, 00880 Helsinki, Finland
6. Department of Oral Pathology and Radiology, University of Turku, 20520 Turku, Finland
7. Department of Pathology, Turku University Hospital, 20520 Turku, Finland
8. Department of Obstetrics and Gynecology, Faculty of Medicine and Health Technology, Tampere University, 33100 Tampere, Finland
9. Department of Obstetrics and Gynecology, Tampere University Hospital, 33520 Tampere, Finland