1. Patient Health Outcomes Research and Clinical Effectiveness Unit; Edmonton AB Canada
2. Division of General Internal Medicine; Department of Medicine; Edmonton AB Canada
3. Division of Critical Care Medicine; Department of Medicine; Edmonton AB Canada
4. Division of Cardiology; Department of Medicine; Edmonton AB Canada
5. Division of Medical Biochemistry; Department of Laboratory Medicine and Pathology; University of Alberta; Edmonton AB Canada
6. Department of Surgery; University of Manitoba; Winnipeg MB, Canada
7. Iberoamerican Cochrane Center; Biomedical Research Institute Sant Pau (IIB-Sant Pau); CIBER de Epidemiología y Salud Pública (CIBERESP); Barcelona Spain
8. Departments of Clinical Epidemiology and Biostatistics and Medicine; The Population Health Research Institute; Hamilton Health Sciences and McMaster University; Hamilton ON Canada