1. Department of Human Reproduction, Division of Gynaecology and Obstetrics, University Medical Centre Ljubljana, Ljubljana, Slovenia
2. Department of Obstetrics and Gynecology, “Filippo Del Ponte” Hospital, University of Insubria, Varese, Italy
3. Department of Obstetrics and Gynecology, Spedali Civili of Brescia, Brescia, Italy
4. Faculty of Medicine, University of Ljubljana, Ljubljana, Slovenia