Affiliation: | a Department of Orthopaedic Surgery, Japan Labor Health and Welfare Organization Spinal Injuries Center, Fukuoka, Japan;c Department of Rehabilitation Medicine, Japan Labor Health and Welfare Organization Spinal Injuries Center, Fukuoka, Japan;d Department of Surgery, Iizuka Hospital, Fukuoka, Japan;b Departments of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan. |