1Department of Obstetrics and Gynecology, Faculty of Medicine, Josip Juraj Strossmayer University of Osijek, Osijek, Croatia; 2Osijek University Hospital Center, Osijek, Croatia; 3Department of Obstetrics and Gynecology, Vukovar General Hospital, Vukovar, Croatia; 4Department of Internal Medicine, Vukovar General Hospital, Vukovar, Croatia.