1. School of Medicine, University of Belgrade, Belgrade, Serbia
2. Clinic of Gynecology and Obstetrics, University Clinical Centre of Serbia, Belgrade, Serbia
3. Institute of Medical Statistics and Informatics, Belgrade, Serbia
4. Department of Histopathology, University Clinical Centre of Serbia, Belgrade, Serbia
5. Department of Obstetrics and Gynaecology, “Ignazio Veris Delli Ponti” Hospital Ringgold Standard Institution, Scorrano, Italy
6. Department of Gynecology, University Hospital “Saint Anna”, Medical University of Varna, Varna, Bulgaria
7. Scientific Associate of Medical Faculty, University of Freiburg, Freiburg im Breisgau, Germany