1 Division of Infectious Diseases, Department of Medicine, Institute of Medical Sciences and Institute of Health Policy, Management, and Evaluation, University of Toronto, Toronto, ON, Canada; Li Ka Shing Knowledge Institute, St Michael's Hospital, Unity Health Toronto, Toronto, ON M5B 1T8, Canada. Electronic address: sharmistha.mishra@utoronto.ca.
2 Department of Epidemiology, Johns Hopkins University, Baltimore, MD, USA.