1 Department of Gynecology and Obstetrics, Faculty of Medicine, University of Nis, Nis, Serbia; Clinic of Gynecology and Obstetrics, Clinical Center Nis, Nis, Serbia. Electronic address: milosevic.stevanovic@medfak.ni.ac.rs.
2 Department of Pathology, Faculty of Medicine, University of Nis, Nis, Serbia; Center for Pathology, Clinical Center Nis, Nis, Serbia.
3 Department of Gynecology and Obstetrics, Faculty of Medicine, University of Nis, Nis, Serbia; Clinic of Gynecology and Obstetrics, Clinical Center Nis, Nis, Serbia.
4 Department of Gynecology and Obstetrics, Faculty of Medicine, University of Nis, Nis, Serbia.