1. Clinical Immunology Unit, The Chinese University of Hong Kong, Hong Kong
2. University of Utrecht, Utrecht, The Netherlands
3. Department of Medicine and Therapeutics, The Chinese University of Hong Kong, Hong Kong
4. Department of Anatomical and Cellular Pathology, The Chinese University of Hong Kong, Hong Kong
5. Department of Microbiology, The Chinese University of Hong Kong, Hong Kong
6. Centre for Emerging Infectious Diseases, The Chinese University of Hong Kong, Hong Kong