1. Department of Geriatric Medicine and Neurology, Ehime University Graduate School of Medicine, Toon, Japan
2. The Faculty of Collaborative Regional Innovation, Ehime University, Matsuyama, Japan
3. Department of Advanced Neurosurgery, Ehime University Graduate School of Medicine, Toon, Japan
4. Peptide Division, Nitta Gelatin Incorporated, Osaka, Japan
5. Department of Bone and Joint Surgery, Ehime University Graduate School of Medicine, Toon, Japan