[1] Duke Univ, Med Ctr, Dept Neurol, Durham, NC 27708 USA
[2] SUNY Buffalo, Sch Med & Biomed Sci, Dept Neurol, Buffalo, NY 14260 USA
[3] Univ Miami, Miller Sch Med, Dept Neurol, Coral Gables, FL 33124 USA
[4] Catholic Univ, Dept Neurol, Rome, Italy
[5] Univ Bergen, Dept Clin Med, N-5020 Bergen, Norway
[6] Univ Autonoma Barcelona, Hosp Santa Creu & St Pau, Dept Neurol, Barcelona, Spain
[7] CIBERER U762, Barcelona, Spain
[8] Northwestern Feinberg Sch Med, Dept Pediat, Chicago, IL USA
[9] Northwestern Feinberg Sch Med, Dept Neurol, Chicago, IL USA
[10] Univ Klinikum Erlangen, Neurol Klin, Erlangen, Germany
[11] Univ Tubingen, Inst Clin Res, Tubingen, Germany
[12] Kyushu Univ, Grad Sch ofMed Sci, Dept Neurol Therapeut, Fukuoka, Japan
[13] Univ Western Ontario, Dept Clin Neurol Sci, London, ON, Canada
[14] Oxford Univ Hosp Trust, John Radcliffe Hosp, Dept Clin Neurol, Oxford, England
[15] Univ Calif Davis, Dept Neurol, Davis, CA 95616 USA
[16] Leiden Univ, Med Ctr, Dept Neurol, Leiden, Netherlands
[17] Harvard Med Sch, Beth Israel Deaconess Med Ctr, Dept Neurol, Boston, MA USA