[1] Tulane Natl Primate Res Ctr, Covington, LA 70433 USA
[2] Tulane Univ, Sch Publ Hlth, Dept Trop Med, New Orleans, LA 70112 USA
[3] Tulane Univ, Sch Med, Dept Microbiol & Immunol, New Orleans, LA 70112 USA
[4] Tulane Univ, Sch Med, Dept Pathol, New Orleans, LA 70112 USA
[5] Los Alamos Natl Lab, Los Alamos, NM 87545 USA
[6] NIAID, Human Immunol Sect, Vaccine Res Ctr, NIH, Bethesda, MD 20892 USA
[7] Univ Penn, Sch Med, Dept Pathol, Philadelphia, PA 19107 USA