1. University of Banja Luka, Faculty of Medicine, Midwifery, Radosnica Pregnancy center, Republic of Srpska, Bosnia and Herzegovina, Banja Luka
2. University of Banja Luka, Faculty of Medicine, Department of Histology and Embryology, University Clinical Center Banja Luka, Republic of Srpska, Bosnia and Herzegovina
3. University of Banja Luka, Faculty of Medicine, Dr Miroslav Zotović Institute for Physical Medicine and Rehabilitation, Department of Physical Medicine and Rehabilitation, Banja Luka, Republic of Srpska, Bosnia and Herzegovina
4. University of Belgrade, Faculty of Medicine, Medical Institute for Rehabilitation, Department of Physical Medicine and Rehabilitation, Belgrade, Serbia