1. Department of Medicine (G.E.U., D.S., G.R., B.K., A.L., A.Q., V.B., L.S.P.), Emory University, Atlanta, Georgia 30303
2. Rollins School of Public Health (L.P.), Emory University, Atlanta, Georgia 30303
3. University of Tennessee Health Science Center (A.E.K.), Memphis, Tennessee 38163