1. Department of Community Medicine, Aminu Kano Teaching Hospital, Bayero University Kano, Kano, Nigeria
2. Department of Medicine, Yobe State University Teaching Hospital, Damaturu, Nigeria
3. Department of Family Medicine, Yobe State University Teaching Hospital, Damaturu, Nigeria
4. Department of Medicine, Murtala Muhammad Specialist Hospital, Kano, Nigeria
5. Department of Clinical Nutrition and Dietetics, College of Health Sciences, University of Sharjah, Sharjah, United Arab Emirates
6. University Sleep Disorders Center, Department of Internal Medicine, College of Medicine, King Saud University, Riyadh, Saudi Arabia
7. Department of Psychiatry and Behavioral Sciences, College of Medicine and Health Sciences, United Arab Emirates University, Al Ain, United Arab Emirates
8. Department of Family Medicine, United Arab Emirates University, Al Ain, United Arab Emirates