1. Department of Pharmacology, School of Medicine, Keio University, Shinjyuku-ku, Tokyo, Japan.
2. Department of Molecular Biology and Medicine, Research Center for Advanced Science and Technology, The University of Tokyo, Meguro-ku, Tokyo, Japan.
3. Institute of Immunology Co., Bunkyo, Tokyo, Japan.
4. Department of Multiple Sclerosis Therapeutics, Tohoku University Graduate School of Medicine, Aoba-ku, Sendai, Japan.