From the aDepartment of Epidemiology, Rollins School of Public Health, Emory University, Atlanta, GA; bDepartment of Epidemiology, Biostatistics, & Occupational Health, McGill University, Quebec, Canada; and cDepartment of Epidemiology, and dDepartment of Biostatistics, Harvard T.H. Chan, School of Public Health, Harvard University, Cambridge, MA.
Disclosure: The authors report no conflicts of interest.
Correspondence: Timothy L. Lash, Department of Epidemiology, Rollins School of Public Health, Emory University, 1518 Clifton Rd. NE, CNR3, Atlanta, GA 30322. E-mail: firstname.lastname@example.org.