[1] Tohoku Univ, Dept Neurol, Grad Sch Med, Aoba Ku, 1-1 Seiryomachi, Sendai, Miyagi 9808574, Japan
[2] Tohoku Univ, Grad Sch Med, Dept Multiple Sclerosis Therapeut, Aoba Ku, 1-1 Seiryomachi, Sendai, Miyagi 9808574, Japan
[3] Pontificia Univ Catolica Rio Grande do Sul, Brain Inst, Ave Ipiranga,6690 Bldg 63, BR-90610000 Porto Alegre, RS, Brazil
[4] Yonezawa Natl Hosp, Dept Neurol, 26100-1 Misawa, Yonezawa, Yamagata 9921202, Japan
[5] Fukushima Med Univ, Dept Multiple Sclerosis Therapeut, Southern TOHOKU Res Inst Neurosci, Multiple Sclerosis & Neuromyelitis Opt Ctr,Sch Me, 7-115 Yatsuyamada, Koriyama, Fukushima 9638563, Japan