1. Institute of Blood Transfusion, Chinese Academy of Medical Sciences, Peking Union Medical College, Chengdu, Sichuan 610052, China
2. Toronto General Research Institute, University of Toronto, Toronto, Ontario, Canada M5S 1A1
3. Department of Infectious Diseases, The 1st Affiliated Hospital of Chongqing Medical University, Chongqing, China
4. Department of Microbiology and Immunology, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
5. Graduate Institute of Medical Sciences, College of Medicine, Taipei Medical University, Taipei, Taiwan
6. Department of Microbiology & Immunology, Dalhousie University, Halifax, Nova Scotia, Canada B3H 4R2
7. Department of Medicine, University of Toronto, Toronto, Canada M5S 1A1
8. Department of Surgery, University of Toronto, Toronto, Canada M5S 1A1