[1] Univ Hong Kong, State Key Lab Emerging Infect Dis, Hong Kong, Hong Kong, Peoples R China
[2] Univ Hong Kong, Dept Microbiol, Hong Kong, Hong Kong, Peoples R China
[3] Univ Hong Kong, Res Ctr Infect & Immunol, Hong Kong, Hong Kong, Peoples R China
[4] Shantou Univ, Coll Med, Int Inst Infect & Immunity, Shantou, Peoples R China
[5] Univ Hong Kong, Dept Community Med, Hong Kong, Hong Kong, Peoples R China
[6] Univ Hong Kong, Sch Publ Hlth, Hong Kong, Hong Kong, Peoples R China
[7] St Jude Childrens Res Hosp, Div Virol, Dept Infect Dis, Memphis, TN 38105 USA