[1] King Khalid Univ, Dept Med, Coll Med, Abha 61421, Saudi Arabia
[2] Minist Hlth, Abha 11176, Saudi Arabia
[3] King Khalid Univ, Dept Family & Community Med, Coll Med, Abha 62529, Saudi Arabia
[4] Alexandria Univ, High Inst Publ Hlth, Biostat Dept, 65 Garidet St,El Horeya Rd, Alexandria 21526, Egypt
[5] King Khalid Univ, Med City, Abha 61421, Saudi Arabia
[6] Natl Guard Hosp, Crit Care Med, Riyadh 14611, Saudi Arabia