1. Department of Microbiology, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Pok Fu Lam, Hong Kong
2. Department of Microbiology, Queen Mary Hospital, Pok Fu Lam, Hong Kong
3. State Key Laboratory of Emerging Infectious Diseases and the Research Centre of Infection and Immunology, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong
4. Carol Yu Centre for Infection, The University of Hong Kong, Pok Fu Lam, Hong Kong
5. Department of Microbiology and Immunology, The University of British Columbia, Vancouver, British Columbia, Canada