1. Department of Medicine, University of British Columbia, Vancouver V5Z 1M9, Canada
2. Department of Medicine, University of Toronto, Toronto, ON M5S 1A8, Canada
3. Department of Internal Medicine, Yale University School of Medicine, New Haven, CT 06510, USA
4. Research Institute of the McGill University Health Centre, Montreal, QC H4A 3J1, Canada
5. McGill University Health Center Medical Libraries, Montreal, QC H3G 1A4, Canada
6. Centre for Heart Lung Innovation, University of British Columbia, 1081 Burrard Street – Room 166, Vancouver V6Z 1Y6, Canada