1. Faculty of Medicine, University of Belgrade, Belgrade, Serbia
2. Department of Education, Secondary School for Nursing, Cuprija, Serbia
3. Department of Epidemiology, Faculty of Medicine, University of Pristina Temporarily Seated in Kosovska Mitrovica, Kosovska Mitrovica, Serbia
4. Department of Prevention and Control, Institute of Public Health of Serbia “Dr Milan Jovanovic Batut”, Belgrade, Serbia
5. Institute of Anatomy, Faculty of Medicine, University of Pristina Temporarily Seated in Kosovska Mitrovica, Kosovska Mitrovica, Serbia
6. Clinic for Obstetrics and Gynecology, Clinical Center of Serbia, Belgrade, Serbia
7. Department of Primary Prevention, The Deparment of Prevention The Military Medical Academy of the University of Defense, Belgrade, Serbia
8. Institute of Epidemiology, Faculty of Medicine, University of Belgrade, Belgrade, Serbia