1. Department of Health Research Methods, Evidence, and Impact, McMaster University, Hamilton, ON, Canada;
2. SUNY Upstate Medical Center, Syracuse, NY;
3. Advocate Research Institute, Advocate Health Care, Downers Grove, IL;
4. Research Department of Epidemiology and Public Health, University College London, London, UK;
5. Department of Internal Medicine, Division of Nephrology and Hypertension, University of Kansas, Kansas City, KS; and
6. Department of Medicine, McMaster University, Hamilton, ON, Canada