1. Department of Gynecology and Reproductive Medicine, Karolinska University Hospital, Huddinge, 14186 Stockholm, Sweden
2. Division of Obstetrics and Gynecology, Department of Clinical Science, Intervention and Technology, Karolinska Institutet, Huddinge, 14186 Stockholm, Sweden
3. Department of Obstetrics and Gynaecology, Faculty of Medicine, School of Health Sciences, University of Thessaly, 41500 Larisa, Greece