[1] Hong Kong Childrens Hosp, Dept Paediat & Adolescent Med, Paediat Intens Care Unit, Hong Kong, Peoples R China
[2] Univ Hong Kong, Queen Mary Hosp, Dept Microbiol, Hong Kong, Peoples R China
[3] Univ Hong Kong, Carol Yu Ctr Infect, Hong Kong, Peoples R China
[4] Hong Kong Childrens Hosp, Dept Pathol, Hong Kong, Peoples R China