1. Department of Microbiology & Immunology, Life Sciences Institute, University of British Columbia, Vancouver, British Columbia, Canada
2. Department of Laboratory Medicine, Yale School of Medicine, New Haven, Connecticut, USA
3. Department of Microbiology, Immunology and Transplantation, Rega Institute for Medical Research, Laboratory of Virology and Chemotherapy, KU Leuven–University of Leuven, Leuven, Belgium
4. Department of Pathology, University of British Columbia, Vancouver, British Columbia, Canada
5. Department of Immunobiology, Yale School of Medicine, New Haven, Connecticut, USA