1. Department of Microbiology, Kwong Wah Hospital, Hong Kong, China
2. Department of Microbiology, The University of Hong Kong, Hong Kong, China
3. Department of Pathology, Hong Kong Sanatorium and Hospital, Hong Kong, China
4. Research Centre of Infection and Immunology, The University of Hong Kong, Hong Kong, China
5. State Key Laboratory of Emerging Infectious Diseases, The University of Hong Kong, Hong Kong, China
6. Carol Yu Centre for Infection, The University of Hong Kong, Hong Kong, China