1. Department of Community Health and Nutrition, Faculty of Health Sciences, University of Al-Razia, Sana’a, Yemen
2. Department of Community Medicine, Faculty of Medicine, 21 September University of Medical and Applied Sciences, Sana’a, Yemen
3. Department of Community Medicine, Faculty of Medical and Health Sciences, Sana’a University, Sana’a, Yemen
4. Department of Community Health, College of Nursing, University of Hail, Hail, Kingdom of Saudi Arabia
5. Department of Medical, Faculty of Medical and Health Sciences, Hodeidah University, Hodeidah, Yemen
6. Department of Community Medicine and Public Health, Faculty of Medicine and Health Sciences, Thamer University, Sana’a, Yemen