1. Advanced Clinical Research Center, Fukushima Global Medical Science Center, Fukushima Medical University
2. Department of Neurosurgery, Shanghai East Hospital, Tongji University School of Medicine
3. Department of Neurosurgery, Graduate School of Medicine, Hokkaido University
4. Department of Dermatology, Graduate School of Medicine, Hokkaido University
5. Division of Clinical Research Administration, Hokkaido University Hospital