[1] Univ Chicago, Med Genet Sect, Dept Med, Chicago, IL 60637 USA
[2] Univ Chicago, Comm Genet Genom & Syst Biol, Chicago, IL 60637 USA
[3] Univ Chicago, Comm Immunol, Chicago, IL 60637 USA
[4] Univ Chicago, Dept Pathol, Chicago, IL 60637 USA
[5] Univ Chicago, Comm Microbiol, Chicago, IL 60637 USA