1 Population Health Research Institute, Hamilton, Ontario, Canada; Department of Clinical Epidemiology and Biostatistics and Division of Cardiac Surgery, McMaster University, Hamilton, Ontario, Canada. Electronic address: Richard.Whitlock@phri.ca.
2 Brigham and Women's Heart & Vascular Center, Harvard Medical School, Boston, Massachusetts. Electronic address: https://twitter.com/DLBHATTMD.
3 Population Health Research Institute, Hamilton, Ontario, Canada; Department of Medicine, McMaster University, Hamilton, Ontario, Canada.