1. Department of Public Health, Faculty of Medicine, Beni-Suef University, Beni-Suef, Egypt;
2. Department of Public Health, Graduate School of Medicine, Osaka University, Osaka, Japan;
3. Department of Community, Environmental and Occupational Medicine, Faculty of Medicine, Ain Shams University, Cairo, Egypt;
4. Department of Family and Community Medicine, Faculty of Medicine, Jazan University, Jazan, Kingdom of Saudi Arabia;
5. Department of Emergency Medicine, University of Maryland School of Medicine, Baltimore, MD, USA;
6. Department of Epidemiology and Public Health, University of Maryland School of Medicine, Baltimore, Maryland, USA