1 Division of General Internal Medicine, Department of Medicine, The Ottawa Hospital, University of Ottawa, 1053 Carling Ave, D 107, Box 209, Ottawa, ON, K1Y 4E9, Canada. magaudreau@toh.ca.
2 Division of General Internal Medicine, Department of Medicine, University of British Columbia, Vancouver, BC, Canada.
3 Division of General Internal Medicine, Department of Medicine, University of Ottawa, Ottawa, ON, Canada.
4 Division of General Internal Medicine, Department of Medicine, University of Calgary, Calgary, AB, Canada.
5 Division of General Internal Medicine, Department of Medicine, Western University, London, ON, Canada.
6 Division of General Internal Medicine, Department of Medicine, University of Alberta, Edmonton, AB, Canada.
7 Division of Emergency Ultrasound, Department of Emergency Medicine, Massachusetts General Hospital, Boston, MA, USA.
8 Department of Community Health Sciences, University of Calgary, Calgary, AB, Canada.