Affiliations:
  1. Department of Epidemiology and Biostatistics, McGill University, Montreal, QC
  2. Department of Epidemiology, Gillings Schools of Global Public Health, UNC Chapel Hill, NC
  3. Department of Population Medicine, Harvard T.H. Chan School of Public Health, Boston, MA
  4. Department of Medicine, University of Pittsburg, Pittsburgh, PA
  5. Louisiana Public Health Institute, New Orleans, LA