1. Division of Epidemiology and Community Health, School of Public Health, University of Minnesota, Minneapolis, MN
2. Department of Medicine, Brigham and Women's Hospital and Beth Israel Deaconess Medical School, Harvard Medical School, Boston, MA
3. Division of Public Health Sciences, Wake Forest University Health Sciences, Winston-Salem, NC
4. Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, MA
5. Johns Hopkins University School of Medicine, Baltimore, MD
6. Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD