1. These authors contributed equally to the research
2. School of Public Health, LKS Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, China
3. Li Ka Shing Institute of Health Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong SAR, China.
4. The Jockey Club School of Public Health and Primary Care, The Chinese University of Hong Kong, Hong Kong SAR, China
5. Department of Medicine & Therapeutics, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong SAR, China
6. Department of Pathology, North Lantau Hospital, Hong Kong SAR, China
7. Centre for Immunology and Infection, Hong Kong Science Park, Shatin, Hong Kong SAR, China
8. Stanley Ho Centre for Emerging Infectious Diseases, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong SAR, China