[1] Univ Calif Davis, Sch Med, Dept Biochem & Mol Med, Davis, CA 95616 USA
[2] Univ Calif Davis, Med Ctr, MIND Inst, Sacramento, CA 95817 USA
[3] Azienda Osped Univ Senese, Siena, Italy
[4] Univ Calif Davis, Sch Med, Dept Biochem & Mol Med, Davis, CA 95616 USA
[5] Un iv Calif Davis, Med Ctr, Dept Radiol, Sch Med, Sacramento, CA USA
[6] Univ Siena, Dept Pediat, I-53100 Siena, Italy
[7] Univ Colorado, Hlth Sci Ctr, Dept Neurol, Boulder, CO 80309 USA
[8] CHU Caen, Serv Neurol, Caen, France