[1] Univ Hong Kong, Dept Med, Hong Kong, Hong Kong, Peoples R China
[2] Univ Birmingham, Dept Clin Pharmacol, Birmingham, W Midlands, England
[3] Queen Mary Hosp, Clin Biochem Unit, Hong Kong, Hong Kong, Peoples R China
[4] Univ Birmingham, Dept Epidemiol & Publ Hlth, Birmingham, W Midlands, England
[5] Univ Hong Kong, Dept Community Med, Hong Kong, Hong Kong, Peoples R China
[6] Chinese Univ Hong Kong, Dept Med & Therapeut, Hong Kong, Hong Kong, Peoples R China
[7] Univ Melbourne, Dept Med, Western Hosp, Footscray, Vic, Australia