1. Respiratory Therapy Department, Batterjee Medical College, Khamis Mushait, Saudi Arabia
2. Department of Respiratory Therapy, Georgia State University, Atlanta, GA, USA
3. Department of Respiratory Therapy, Faculty of Medical Rehabilitation Sciences, King Abdulaziz University, Jeddah, Saudi Arabia
4. Respiratory Therapy Unit, King Abdulaziz University Hospital, Jeddah, Saudi Arabia
5. Respiratory Therapy Department, Faculty of Applied Medical Sciences, Jazan University, Jazan, Saudi Arabia