1. Department of Medicine, University of Toronto, Toronto, M5S 1A1, Canada
2. Faculty of Arts and Sciences, University of Toronto, Toronto, M5S 3G3, Canada
3. Institute of Medical Science, University of Toronto, Toronto, M5S 1A1, Canada
4. Public Health Ontario Laboratories, Public Health Ontario, Toronto, M5G 1M1, Canada
5. Tropical Disease Unit, Toronto General Hospital, Toronto, M5G 2C4, Canada