[1] Massachusetts Gen Hosp, Ctr Immunol & Inflammatory Dis, Boston, MA 02114 USA
[2] Massachusetts Gen Hosp, Div Rheumatol Allergy & Immunol, Boston, MA 02114 USA
[3] Harvard Univ, Sch Med, Cambridge, MA 02138 USA
[4] Duke Univ, Med Ctr, Dept Mol Genet & Microbiol, Durham, NC 27706 USA