1. Department of Respiratory Therapy, College of Applied Medical Sciences, King Saud bin Abdulaziz University for Health Sciences, Jeddah, Saudi Arabia
2. King Abdullah International Medical Research Center, Jeddah, Saudi Arabia
3. Seton Hall University, Nutley, NJ
4. Department of Respiratory Therapy, College of Applied Medical Sciences, King Saud bin Abdulaziz University for Health Sciences, Riyadh, Saudi Arabia
5. King Abdullah International Medical Research Center, Riyadh, Saudi Arabia
6. Department of Respiratory Therapy, Batterjee Medical College, Jeddah, Saudi Arabia
7. Department of Respiratory Therapy, College of Medical Rehabilitation Sciences, King Abdulaziz University, Jeddah, Saudi Arabia