[1] Stanford Univ, Div Immunol & Rheumatol, Dept Med, Stanford, CA 94305 USA
[2] Stanford Univ, Beckman Ctr, Dept Neurol & Neurol Sci, Stanford, CA 94305 USA
[3] Stanford Univ, Beckman Ctr, Dept Pathol, Stanford, CA 94305 USA
[4] Univ Utah, Div Hematol, Salt Lake City, UT 84132 USA
[5] AnaSpec Inc, San Jose, CA 95131 USA