1. Chronic Viral Illness Service, McGill University Health Centre, Montreal, QC H4A 3J1, Canada
2. Research Institute of the McGill University Health Centre, Montreal, QC H4A 3J1, Canada
3. Department of Infectious Diseases, Shanghai Public Health Clinical Center, Shanghai 201508, PR China
4. Department of Microbiology & Immunology, McGill University, Montreal, QC H4A 3J1, Canada
5. Division of Hematology, Department of Medicine, McGill University Health Centre, Montreal, QC H4A 3J1, Canada