[1] NGHA, Dept Family Med & Primary Hlth Care, Riyadh, Saudi Arabia
[2] King Abdullah Bin Abdulaziz Univ Hosp, Dept Family & Community Med, Riyadh, Saudi Arabia
[3] NGHA, Dept Community Med, POB 22490, Riyadh 11426, Saudi Arabia
[4] King Saud Univ Hlth Sci KSAU HS, NGHA, Coll Med, Dept Med Microbiol, Riyadh, Saudi Arabia