1. Department of Medicine, Queen Mary Hospital, The University of Hong Kong , Hong Kong SAR , China
2. State Key Laboratory of Emerging Infectious Diseases, Carol Yu Centre for Infection, Department of Microbiology, The University of Hong Kong , Hong Kong SAR , China
3. Department of Medicine, Pamela Youde Nethersole Eastern Hospital , Hong Kong SAR , China
4. Department of Medicine and Geriatrics, Ruttonjee Hospital , Hong Kong SAR , China
5. Department of Microbiology, Queen Mary Hospital, The University of Hong Kong , Hong Kong SAR , China
6. Department of Clinical Pathology, Pamela Youde Nethersole Eastern Hospital , Hong Kong SAR , China
7. Department of Intensive Care, Queen Mary Hospital, The University of Hong Kong , Hong Kong SAR , China
8. Department of Intensive Care, Pamela Youde Nethersole Eastern Hospital , Hong Kong SAR , China
9. Centre for Virology, Vaccinology and Therapeutics, Hong Kong Science and Technology Park , Hong Kong SAR , China