[1] Oregon Hlth & Sci Univ, Div Pediat Neurol, CDRC P, Dept Pediat, Portland, OR 97239 USA
[2] Oregon Hlth & Sci Univ, Child Dev & Rehabil Ctr, Div Dev Pediat, Portland, OR 97239 USA
[3] Oregon Hlth & Sci Univ, Dept Neurol, Oregon Multiple Sclerosis Ctr, Portland, OR 97239 USA
[4] Oregon Hlth & Sci Univ, Dept Pathol, Div Neuropathol, Portland, OR 97239 USA
[5] Oregon Hlth & Sci Univ, Dept Ophthalmol, Portland, OR 97239 USA
[6] Oregon Hlth & Sci Univ, Program Neurosci, Portland, OR 97239 USA
[7] Hosp Sick Children, Dept Neurol, Toronto, ON M5G 1X8, Canada
[8] Hosp Sick Children, Reg Pediat Multiple Sclerosis Ctr, Dept Struct Biol & Biochem, Toronto, ON M5G 1X8, Canada
[9] Univ Penn, Dept Neurol, Div Neurooncol, Philadelphia, PA 19104 USA