1. School of Medicine, Faculty of Health and Medical Sciences, Taylor’s University, Selangor, Malaysia;
2. Department of Otolaryngology, Menoufia University, Menoufia, Egypt;
3. Faculty of Medicine, University of Aleppo, Aleppo, Syrian Arab Republic;
4. Faculty of Medicine, University of Medicine and Pharmacy, Ho Chi Minh City, Vietnam;
5. Egyptian National Blood Transfusion Services, Cairo, Egypt;
6. Faculty of Medicine, Ain Shams University, Cairo, Egypt;
7. Evidence Based Medicine Research Group, Ton Duc Thang University, Ho Chi Minh City, Vietnam;
8. Faculty of Applied Sciences, Ton Duc Thang University, Ho Chi Minh City, Vietnam