1. Department of Respiratory Therapy, College of Applied Medical Sciences, King Saud bin Abdulaziz University for Health Sciences, Riyadh, Saudi Arabia
2. King Abdullah International Medical Research Center, Riyadh, Saudi Arabia
3. Respiratory Services, Ministry of the National Guard – Health Affairs, Riyadh, Saudi Arabia
4. Department of Health Services Management, College of public health and Health Informatics, Umm Al Qura University, Makkah, Saudi Arabia
5. Physical Therapy Department, Allied Health Sciences, Kuwait University, Kuwait city, Kuwait
6. Respiratory Care Department, Al-Razi University, Sana’a, Yemen
7. Internal Medicine, Wadi Elneel Hospital, Cairo, Egypt
8. Department of Family and Community Medicine, College of Medicine, Taibah University, Madinah, Saudi Arabia