[1] Minist Hlth, Riyadh, Saudi Arabia
[2] Alfaisal Univ, Coll Med, Riyadh, Saudi Arabia
[3] Reg Hlth Directorate, Jazan, Saudi Arabia
[4] Univ Florida, Emerging Pathogens Inst, Coll Publ Hlth & Hlth Profess, Gainesville, FL USA
[5] Univ Hong Kong, Sch Publ Hlth, Hong Kong, Hong Kong, Peoples R China
[6] Univ Hong Kong, HKU Pasteur Res Pole, Hong Kong, Hong Kong, Peoples R China
[7] ICDDR B, Ctr Communicable Dis, Dhaka, Bangladesh