1. University of Toronto, Toronto, Ontario, Canada (A.R.T., D.F.)
2. University of Toronto and University Health Network, Toronto, Ontario, Canada (I.I.B.)
3. St. Michael's Hospital and BlueDot, Toronto, Ontario, Canada (R.S., A.W.)
4. University of Toronto, St. Michael's Hospital, and BlueDot, Toronto, Ontario, Canada (K.K.)