1. Department of Obstetrics and Gynecology, University of Lund, Lund, Sweden
2. Department of Microbiology, Porto Medical School, Porto, Portugal
3. Weill Medical College of Cornell University, New York Presbyterian Hospital, New York, NY, USA
4. Department of Obstetrics and Gynecology, National Medical University, Kiev, Ukraine
5. Department of Obstetrics and Gynecology, Porto Medical School, Porto, Portugal
6. Institute of Gynecology and Obstetrics, Trieste University, Trieste, Italy