1. Department of Medicine, Division of Infectious Diseases, St Michael’s Hospital, 30 Bond Street, Toronto, Ontario, M5B 1W8, Canada.
2. Li Ka Shing Knowledge Institute, St Michael's Hospital, Toronto, Canada.
3. Children's Hospital Informatics Program, Boston Children's Hospital, Harvard Medical School, Boston, United States of America (USA).
4. Department of Medicine, University of Toronto, Toronto, Canada.
5. Division of Emergency Medicine, Children's Hospital, Boston, USA.
6. Department of Mathematics, University of Manitoba, Winnipeg, Canada.
7. Department of Geography, Ryerson University, Toronto, Canada.
8. Division of Global Migration and Quarantine, Centers for Disease Control and Prevention, Atlanta, USA.