[1] Univ So Calif, Keck Sch Med, Dept Neurol, Los Angeles, CA 90033 USA
[2] Univ So Calif, Keck Sch Med, Dept Prevent Med, Los Angeles, CA 90033 USA
[3] Univ So Calif, Keck Sch Med, Dept Cell & Neurobiol, Los Angeles, CA 90033 USA
[4] Univ So Calif, Keck Sch Med, Dept Mol Microbiol & Immunol, Los Angeles, CA 90033 USA
[5] Univ So Calif, Los Angeles Cty Med Ctr, Keck Sch Med, Dept Med,Div Rheumatol, Los Angeles, CA 90033 USA