1. State Key Laboratory for Emerging Infectious Diseases, Carol Yu Centre for Infection, Department of Microbiology, Li Ka Shing Faculty of Medicine, University of Hong Kong, Pokfulam, Hong Kong Special Administrative Region, China
2. Department of Microbiology, Queen Mary Hospital, Hong Kong Special Administrative Region, China
3. Department of Medicine, Queen Mary Hospital, Hong Kong Special Administrative Region, China
4. Department of Pathology, Princess Margaret Hospital, Hong Kong Special Administrative Region, China
5. Centre for Health Protection, Department of Health, Hong Kong Special Administrative Region, China