1. Critical Care Medicine Department, Clinical Center, National Institutes of Health, Bethesda; and Critical Care Medicine Branch, National Heart, Lung, and Blood Institute, Bethesda, Maryland (J.R.S., A.Mishuk, C.Y.D., A.Mansera, B.J.S., M.W., C.Y., M.N., S.W., S.S.K.)
2. Department of Biostatistics and Bioinformatics, George Washington University, Washington, DC (G.D.)
3. Critical Care Medicine Department, Clinical Center, National Institutes of Health, Bethesda, Maryland (A.L., N.D.J.)
4. Critical Care Medicine Department, Clinical Center, National Institutes of Health, Bethesda; and Department of Pharmacy, Clinical Center, National Institutes of Health, Bethesda, Maryland (W.L.)
5. Division of Infectious Diseases, Emory University, Atlanta, Georgia (A.B.).