1. Research Centre of Infection and Immunology, State Key Laboratory for Emerging Infectious Diseases, Department of Microbiology, The University of Hong Kong, Pokfulam Road, Pokfulam, Hong Kong Special Administrative Region, China
2. Department of Medicine, The University of Hong Kong, Pokfulam Road, Pokfulam, Hong Kong Special Administrative Region, China
3. Department of Pathology and Clinical Biochemistry, Queen Mary Hospital, Hong Kong Special Administrative Region, China