[1] Chinese Univ Hong Kong, Prince Wales Hosp, Dept Med & Therapeut, Shatin, Hong Kong, Peoples R China
[2] Univ Melbourne, Royal Melbourne Hosp, Dept Med, Melbourne, Vic 3050, Australia
[3] Univ Melbourne, Royal Melbourne Hosp, Dept Neurol, Melbourne, Vic 3050, Australia
[4] Chinese Univ Hong Kong, Sch Pharm, Shatin, Hong Kong, Peoples R China