[1] Univ Hong Kong, Dept Microbiol, Queen Mary Hosp, Hong Kong, Hong Kong, Peoples R China
[2] Univ Hong Kong, State Key Lab Emerging Infect Dis, Hong Kong, Hong Kong, Peoples R China
[3] Univ Hong Kong, Res Ctr Infect & Immunol, Hong Kong, Hong Kong, Peoples R China
[4] Pamela Youde Nethersole Eastern Hosp, Dept Paediat & Adolescent Med, Hong Kong, Hong Kong, Peoples R China
[5] Pamela Youde Nethersole Eastern Hosp, Dept Pathol, Hong Kong, Hong Kong, Peoples R China
[6] Univ Hong Kong, Dept Paediat & Adolescent Med, Queen Mary Hosp, Hong Kong, Hong Kong, Peoples R China
[7] Ctr Hlth Protect, Publ Hlth Lab Ctr, Hong Kong, Hong Kong, Peoples R China