1. Department of Epidemiology, Faculty of Medicine, University of Pristina Temporarily Seated in Kosovska Mitrovica, Kosovska Mitrovica, Serbia
2. Braun School of Public Health and Community Medicine, Hebrew University-Hadassah Jerusalem, Israel
3. Institute of Epidemiology, Faculty of Medicine, University of Belgrade, Belgrade, Serbia
4. Faculty for Sports and Physical Education, University of Belgrade, Belgrade, Serbia
5. Department of Community Medicine, Bharti Medical College, Pune, India