1. Department of Neurology; Tomakomai City Hospital; Tomakomai Japan
2. Department of Neurology; Hokkaido University Graduate School of Medicine; Sapporo Japan
3. Department of Neurology; Sapporo City Hospital; Sapporo Japan
4. Department of Neurosurgery; Tomakomai City Hospital; Tomakomai Japan
5. Multiple Sclerosis Therapeutics; Tohoku University Graduate School of Medicin; Sendai Japan