1. University of North Carolina at Chapel Hill, Chapel Hill, North Carolina (J.K.E., S.R.C., T.L.B., L.M.F., J.J.E.)
2. Emory University, Atlanta, Georgia (J.E.R., V.C.M.)
3. Centers for Disease Control and Prevention, Atlanta, Georgia (K.B., H.I.H.)
4. Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland (E.H., G.D., K.N.A.)
5. Vanderbilt University School of Medicine, Nashville, Tennessee (P.F.R.)
6. University of Calgary, Calgary, Alberta, Canada (M.J.G.)
7. Kaiser Permanente Northern California, Oakland, California (M.J.S.)
8. University of California San Diego, San Diego, California (W.C.M.)
9. Kaiser Permanente Mid-Atlantic Permanente Research Institute, Rockville, Maryland (M.A.H.)
10. Johns Hopkins University, Baltimore, Maryland (J.T., R.D.M.)
11. Yale School of Public Health, New Haven, Connecticut, and Veterans Affairs Connecticut Healthcare System, West Haven, Connecticut (A.J.)
12. University of British Columbia, Vancouver, British Columbia, Canada (V.D.L.)
13. Harvard T.H. Chan School of Public Health, Boston, Massachusetts (R.J.B.)
14. Vanderbilt University Medical Center, Nashville, Tennessee (T.R.S.)
15. University of Alabama at Birmingham, Birmingham, Alabama (M.S.).