1. Division of AIDS, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland (C.B.)
2. Office of the Director, National Institutes of Health, Bethesda, Maryland (R.W.E., J.M.A., F.S.C.)
3. Office of the Director, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland (A.M.L., A.S.F.)
4. Office of the Commissioner, Food and Drug Administration, Silver Spring, Maryland (J.W.).