1. Department of Obstetrics and Gynecology; Vaasa Central Hospital; Vaasa Finland
2. Pathology; Fimlab Laboratories Ltd; Tampere Finland
3. Microbiology; Fimlab Laboratories Ltd; Tampere Finland
4. Science Center; Pirkanmaa Hospital District and School of Health Sciences; University of Tampere; Tampere Finland
5. Obstetrics and Gynecology; Municipal Hospital of Tampere; Tampere Finland
6. Department of Obstetrics and Gynecology; Tampere University Hospital and School of Medicine; University of Tampere; Tampere Finland