1. Clinical Center of Kragujevac , Department of Anesthesiology and Reanimation , Kragujevac , Serbia
2. University of Kragujevac , Faculty of medical Sciences, Department of Surgery , Kragujevac , Serbia
3. University of Kragujevac , Faculty of Medical Sciences , Kragujevac , Serbia
4. University of Kragujevac , Faculty of Medical Sciences, Department of Gynecology and Obstetrics , Kragujevac , Serbia
5. Clinical Center of Kragujevac, Clinic of Gynecology and Obstetrics , Kragujevac , Serbia