[1] Harvard Univ, Sch Med, Dept Microbiol & Immunobiol, Boston, MA USA
[2] Childrens Hosp, Immune Dis Inst, Boston, MA 02115 USA
[3] Ragon Inst MIT MGH & Harvard, Dept Immunol, Boston, MA USA
[4] Emory Univ, Dept Microbiol & Immunol, Atlanta, GA 30322 USA
[5] Emory Univ, Emory Vaccine Ctr, Atlanta, GA 30322 USA
[6] Univ Lausanne, Inst Microbiol, Univ Hosp, Lausanne, Switzerland
[7] Whitehead Inst, Boston, MA USA