1. Department of Advanced Medical Initiatives, Graduate School of Medical Sciences, Kyushu University, Fukuoka 812-8582, Japan.
2. Department of Orthopedic Surgery, Graduate School of Medical Sciences, Kyushu University, Fukuoka 812-8582, Japan.
3. Department of Medical Informatics, Kyushu University, Fukuoka 812-8582, Japan.
4. Department of Rehabilitation, Spinal Injuries Center, Izuka 820-8508, Japan.
5. Department of Orthopaedic Surgery, Spinal Injuries Center, Izuka 820-8508, Japan.
6. Department of Molecular and System Pharmacology, Graduate School of Pharmaceutical Sciences, Kyushu University, Fukuoka 812-8582, Japan.