[1] Univ Hong Kong, Queen Mary Hosp, Dept Microbiol, Div Infect Dis, Pokfulam, Hong Kong, Peoples R China
[2] Yan Chai Hosp, Intens Care Unit, Hong Kong, Hong Kong, Peoples R China
[3] Univ Hong Kong, Queen Mary Hosp, Dept Med, Pokfulam, Hong Kong, Peoples R China
[4] Univ Hong Kong, Queen Mary Hosp, Intens Care Unit, Pokfulam, Hong Kong, Peoples R China