1 Division of General Internal Medicine, University Health Network, 399 Bathurst St., Toronto, ON, M5T 2S8, Canada; Division of General Internal Medicine, Department of Medicine, University of Toronto, 190 Elizabeth Street, R. Fraser Elliott Building 3-805, Toronto, ON, M5G 2C4, Canada; HoPingKong Centre for Excellence in Education and Practice, University Health Network, 399 Bathurst St., Toronto, ON, M5T 2S8, Canada. Electronic address: tom.macmillan@uhn.ca.
2 Division of General Internal Medicine, Department of Medicine, University of Toronto, 190 Elizabeth Street, R. Fraser Elliott Building 3-805, Toronto, ON, M5G 2C4, Canada; Division of General Internal Medicine, Trillium Health Partners, 100 Queensway West, Mississauga, ON, L5B 1B8, Canada.
3 Laboratory Medicine Program, University Health Network, 200 Elizabeth Street, Toronto, ON, M5G 2C4, Canada; Department of Laboratory Medicine and Pathobiology, University of Toronto, Medical Sciences Building, 6th Floor, 1 King's College Cir, Toronto, ON, M5S 1A8, Canada.
4 Division of General Internal Medicine, University Health Network, 399 Bathurst St., Toronto, ON, M5T 2S8, Canada; Division of General Internal Medicine, Department of Medicine, University of Toronto, 190 Elizabeth Street, R. Fraser Elliott Building 3-805, Toronto, ON, M5G 2C4, Canada; HoPingKong Centre for Excellence in Education and Practice, University Health Network, 399 Bathurst St., Toronto, ON, M5T 2S8, Canada.