1. Tawam Hospital, Al Ain, Abu Dhabi, PO Box 64624, United Arab Emirates
2. Al Ain Hospital, Al Ain, Abu Dhabi, United Arab Emirates
3. Department of Physiology, University of Tripoli, Tripoli, Libya
4. Institute of Public Health, College of Medicine and Health Sciences, United Arab Emirates University, Al Ain, Abu Dhabi, United Arab Emirates
5. Zayed Centre for Health Sciences, United Arab Emirates University, Al Ain, Abu Dhabi, United Arab Emirates