Affiliation: | 1. Department of Medicine and Therapeutics, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, New Territories, Hong Kong;2. Stanley Ho Center for Emerging Infectious Diseases, School of Public Health & Primary Care, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, New Territories, Hong Kong;3. Department of Microbiology (Dr Chan), The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, New Territories, Hong Kong |