[1] Tohoku Univ, Grad Sch Med, Dept Neurol, Sendai, Miyagi, Japan
[2] Tohoku Univ, Grad Sch Med, Dept Multiple Sclerosis Therapeut, Sendai, Miyagi, Japan
[3] Tokyo Med Univ, Dept Anat Pathol, Tokyo, Japan
[4] Natl Inst Infect Dis, Dept Virol, Lab Neurovirol, Sendai, Miyagi, Japan
[5] Tohoku Univ, Grad Sch Med, Dept Neurosurg, Sendai, Miyagi, Japan
[6] Tohoku Univ, Grad Sch Med, Dept Pathol, Sendai, Miyagi, Japan
[7] Tohoku Med & Pharmaceut Univ, Dept Neurol, Sendai, Miyagi, Japan
[8] Fukushima Med Univ, Sch Med, Dept Multiple Sclerosis Therapeut, Fukushima, Japan
[9] Southern TOHOKU Res Inst Neurosci, Multiple Sclerosis & Neuromyelitis Opt Ctr, Sendai, Miyagi, Japan