[1] Naval Med Res Ctr, Malaria Program, Silver Spring, MD USA
[2] Walter Reed Army Inst Res, Dept Immunol & Entomol, Silver Spring, MD USA
[3] Henry M Jackson Fdn, Rockville, MD USA
[4] Natl Naval Med Ctr, Bethesda, MD USA
[5] Johns Hopkins Univ, Sch Hyg & Publ Hlth, Dept Mol Microbiol & Immunol, Baltimore, MD USA
[6] Univ Maryland, Sch Med, Dept Microbiol, Baltimore, MD 21201 USA