1 Michael G. DeGroote School of Medicine, Waterloo, Ont.
2 Michael G. DeGroote School of Medicine, Waterloo, Ont; McMaster University, Hamilton, Ont.
3 University of Waterloo, Waterloo, Ont.
4 Michael G. DeGroote School of Medicine, Waterloo, Ont; McMaster University, Hamilton, Ont; University of Toronto, Toronto, Ont. Electronic address: chryssa.mcalister@utoronto.ca.