[1] Prince Sultan Mil Coll Hlth Sci, Dept Resp Care, Dammam, Saudi Arabia
[2] Univ Fed Sao Carlos, Dept Phys Therapy, Cardiopulm Physiotherapy Lab, Sao Carlos, SP, Brazil
[3] Jazan Univ, Fac Appl Med Sci, Resp Therapy Dept, Jazan 45142, Saudi Arabia
[4] King Abdulaziz Univ, Fac Med Rehabil Sci, Dept Resp Therapy, Jeddah, Saudi Arabia
[5] UCL, Inst Global Hlth, Fac Populat Hlth Sci, London NW3 2PF, England
[6] Univ Aisyiyah Bandung, Fac Sci, Bandung 40264, Indonesia
[7] Prince Sultan Mil Coll Hlth Sci, Vice Deanship Post Grad Studies & Res, Dammam, Saudi Arabia
[8] Umm Al Qura Univ, Coll Appl Med Sci, Resp Care Program, Mecca 24382, Saudi Arabia
[9] King Faisal Univ, Resp Therapy Dept, Al Hasa 31982, Saudi Arabia
[10] Isra Univ, Fac Pharm, Dept Appl Pharmaceut Sci & Clin Pharm, Amman 11622, Jordan
[11] Umm Al Qura Univ, Fac Med, Mecca 21514, Saudi Arabia
[12] Univ Gadjah Mada, Fac Med Publ Hlth & Nursing, Dept Publ Hlth, Yogyakarta, Indonesia
[13] UCL, UCL Resp, London, England
[14] King Saud bin Abdulaziz Univ Hlth Sci, Dept Resp Care, Jeddah, Saudi Arabia
[15] King Abdullah Int Med Res Ctr, Jeddah, Saudi Arabia
[16] Prince Sultan Mil Coll Hlth Sci, Curriculum & Study Plan Unit, Vice Deanship Acad Affairs, Dammam, Saudi Arabia
[17] Univ Coll London Hosp, Inst Liver & Digest Hlth, Div Med, London, England