[1] King Saud Univ, Coll Med, Riyadh 11362, Saudi Arabia
[2] King Saud Univ Med City, Crit Care Dept, Riyadh 11362, Saudi Arabia
[3] King Faisal Specialist Hosp & Res Ctr, Riyadh 11211, Saudi Arabia
[4] King Saud Univ Med City, Pediat Dept, Riyadh 11362, Saudi Arabia
[5] King Saud Univ Med City, Dept Family & Community Med, Riyadh 11362, Saudi Arabia
[6] King Saud Univ, Evidence Based Hlth Care & Knowledge Translat Res, Riyadh 11362, Saudi Arabia
[7] Saudi Commiss Hlth Specialties, Riyadh 11614, Saudi Arabia
[8] King Saud Univ Med City, Dept Internal Med, Div Infect Dis, Riyadh 11362, Saudi Arabia
[9] Johns Hopkins Aramco Healthcare, Specialty Internal Med & Qual Dept, Dhahran 34465, Saudi Arabia
[10] Indiana Univ, Sch Med, Dept Med, Infect Dis Div, Indianapolis, IN 46202 USA
[11] Johns Hopkins Univ, Sch Med, Dept Med, Infect Dis Div, Baltimore, MD 21218 USA
[12] King Saud Univ, Fac Med, Prince Abdullah Ben Khaled Coeliac Dis, Riyadh 11362, Saudi Arabia