1. University of Toronto, Toronto, Ontario, Canada (A.K., J.H.B., F.N., A.M., M.G.F.)
2. McMaster University, Hamilton, Ontario, Canada (N.S., K.Y., Q.Z., T.R., S.F., E.P., A.H., L.B., S.A.A.)
3. McGill University, Montreal, Quebec, Canada (F.K.)
4. School of Medicine, McMaster University, Hamilton, Ontario, Canada (S.N.)
5. Northern Ontario School of Medicine, Sudbury, Ontario, Canada (M.M.)
6. University of Calgary, Calgary, Alberta, Canada (A.W.K.)
7. Stanford University, Stanford, California (A.N.)
8. University of Utah School of Medicine, Salt Lake City, Utah (G.W.H.)