[1] Childrens Hosp, Div Crit Care Med, Oakland, CA 94609 USA
[2] Res Ctr Oakland, Oakland, CA 94609 USA
[3] Childrens Hosp, Div Infect Dis, Oakland, CA 94609 USA
[4] Childrens Hosp, Div Neurol, Oakland, CA 94609 USA
[5] Childrens Hosp, Dept Diagnost Imaging, Oakland, CA 94609 USA
[6] Childrens Hosp Wisconsin, Div Infect Dis, Milwaukee, WI 53201 USA
[7] Univ Calif San Francisco, Dept Pathol, Div Neuropathol, Richmond, CA USA
[8] Calif Dept Publ Hlth, Encephalitis & Special Invest Sect, Div Communicable Dis Control, Richmond, CA USA