[1] Tuen Mun Hosp, Hosp Author, Dept Clin Pathol, 23 Tsing Chung Koon Rd,Tuen Mun, Hong Kong, Peoples R China
[2] Princess Margaret Hosp, Hosp Author, Dept Med & Geriatr, 2-10 Princess Margaret Hosp Rd,Lai Chi, Hong Kong, Peoples R China
[3] Alice Ho Miu Ling Nethersole Hosp, Hosp Author, Dept Med, 11 Chuen Rd,Tai Po, Hong Kong, Peoples R China
[4] Univ Hong Kong, Queen Mary Hosp, Dept Med, Room 405B,4-F Professorial Block,,102 Pok Fu Lam, Hong Kong, Peoples R China
[5] Pamela Youde Nethersole Eastern Hosp, Hosp Author, Dept Clin Microbiol, 3 Lok Man Rd, Hong Kong, Peoples R China
[6] United Christian Hosp, Hosp Author, Dept Med & Geriatr, 130 Hip Wo St, Hong Kong, Peoples R China
[7] Queen Elizabeth Hosp, Hosp Author, Dept Med, 30 Gascoigne Rd,Kowloon, Hong Kong, Peoples R China
[8] Ctr Hlth Protect, Surveillance & Epidemiol Branch, 147C Argyle St, Hong Kong, Peoples R China
[9] Ctr Hlth Protect, Infect Control Branch, G-F,147C Argyle St, Hong Kong, Peoples R China