[1] Rosalind Russell Ephraim P Engleman Rheumatol Res, Dept Med, Div Rheumatol, San Francisco, CA USA
[2] Carnegie Mellon Univ, Pittsburgh, PA 15213 USA
[3] Univ Calif San Francisco, San Francisco, CA 94143 USA
[4] Univ Calif San Francisco, Dept Bioengn & Therapeut Sci, San Francisco, CA 94143 USA
[5] Univ Calif San Francisco, Microbiol & Immunol, San Francisco, CA 94143 USA