1. Cathedra for Obstetrics and Gynecology, Faculty of Medicine, University of Osijek, Cara Hadrijana 10e, HR 31000 Osijek, Croatia
2. Clinic for Gynecology and Obstetrics, University Hospital Center Osijek, J. Huttlera 4, HR 31000 Osijek, Croatia
3. Department of Pathology and Forensic Medicine, University Hospital Centre Osijek, J. Huttlera 4, HR 31000 Osijek, Croatia
4. Faculty of Dental Medicine and Health, University of Osijek, Crkvena ulica 21, HR 31000 Osijek, Croatia
5. Department of Obstetrics and Gynecology, National Memorial Hospital, Bolnička 5, HR 32000 Vukovar, Croatia