1University of Maryland, CollegePark, MD.
2Louisiana State University School of Public Health, New Orleans, LA.
3University of North Carolina, Chapel Hill, NC.
4Johns Hopkins Bloomberg School of Public Health, Baltimore, MD.
5National Heart, Lung, and Blood Institute, Bethesda, MD.
6San Diego State University, San Diego, CA.
7University of South Carolina, Columbia, SC.
8University of Pennsylvania, Philadelphia, PA.