1. Department of Neurology, Tokushima University Graduate School of Biomedical Sciences, Tokushima, Japan
2. Clinical Research Center for Developmental Therapeutics, Tokushima University Hospital, Tokushima, Japan
3. Department of Neurology, Fukushima Medical University School of Medicine, Fukushima, Japan
4. Department of Neurology, Juntendo University School of Medicine, Tokyo, Japan
5. Department of Neurology, Teikyo University School of Medicine, Tokyo, Japan
6. Department of Neurology, Nagoya University Graduate School of Medicine, Nagoya, Japan
7. Department of Neurology, Tokyo Metropolitan Neurological Hospital, Tokyo, Japan
8. Department of Neurology, Chiba University Graduate School of Medicine, Chiba, Japan
9. Department of Neurology, Toho University Faculty of Medicine, Tokyo, Japan
10. Department of Neurology, Sumitomo Hospital, Osaka, Japan
11. Department of Neurology, Takeda General Hospital, Kyoto, Japan
12. Department of Neurology, Vihara Hananosato Hospital, Miyoshi, Japan
13. Department of Neurology, National Hospital Organization Iou Hospital, Kanazawa, Japan
14. Department of Neurology, Murakami Karindoh Hospital, Fukuoka, Japan
15. Department of Neurology, Kobe City Medical Center General Hospital, Kobe, Japan
16. Department of Neurology, Shiga University of Medical Science, Otsu, Japan
17. Department of Neurology, Wakayama Medical University, Wakayama, Japan
18. Department of Neurology, Kitasato University School of Medicine, Sagamihara, Japan
19. Department of Neurology, Chikamori Hospital, Kochi, Japan
20. Department of Neurology, Sapporo Medical University, Sapporo, Japan
21. Department of Neurology, Gifu University Graduate School of Medicine, Gifu, Japan
22. Department of Neurology, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama, Japan
23. Department of Neurology, Brain Research Institute, Niigata University, Niigata, Japan
24. Department of Neurology, National Hospital Organization Chibahigashi Hospital, Chiba, Japan
25. Division of Neurology, Department of Internal Medicine, Jichi Medical University, Shimotsuke, Japan
26. Department of Neurology, Juntendo University Shizuoka Hospital, Izunokuni, Japan
27. Department of Neurology, The University of Tokyo, Tokyo, Japan
28. Department of Clinical Neuroscience and Therapeutics, Hiroshima University Graduate School of Biomedical and Health Sciences, Hiroshima, Japan
29. Department of Neurology, Kochi Medical School, Kochi University, Nankoku, Japan
30. Department of Biostatistics, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
31. Translational Research Center for Medical Innovation, Foundation for Biomedical Research and Innovation, Kobe, Japan
32. Division of Regeneration and Medicine, Medical Center for Translational and Clinical Research, Hiroshima University Hospital, Hiroshima, Japan
33. Department of Cardiovascular Regeneration and Medicine, Research Institute for Radiation Biology and Medicine, Hiroshima University, Hiroshima, Japan
34. Department of Neurology, National Hospital Organization Utano Hospital, Kyoto, Japan
35. for the Japan Early-Stage Trial of Ultrahigh-Dose Methylcobalamin for ALS (JETALS) Collaborators