1. Department of Rehabilitation Medicine, Japan Organization of Occupational Health and Safety, Spinal Injuries Center, Fukuoka, Japan
2. Department of Orthopedic Surgery, Japan Organization of Occupational Health and Safety, Spinal Injuries Center, Fukuoka, Japan
3. Department of Bioscience and Bioinformatics, Kyushu Institute of Technology - Iizuka Campus, Fukuoka, Japan