1. Department of Hepato-biliary Pancreatic Surgery and Breast Surgery, Graduate School of Medicine, Ehime University, Toon, Ehime, Japan
2. Department of Neurosurgery, Graduate School of Medicine, Ehime University, Toon, Ehime, Japan
3. Department of Molecular and Cellular Physiology, Graduate School of Medicine, Ehime University, Toon, Ehime, Japan
4. Department of Anesthesia and Perioperative Medicine, Graduate School of Medicine, Ehime University, Toon, Ehime, Japan
5. Department of Gastrointestinal Surgery and Surgical Oncology, Graduate School of Medicine, Ehime University, Toon, Ehime, Japan