1 Department of Rehabilitation Medicine, Seoul National University College of Medicine, Seoul National University Hospital, Seoul, Republic of Korea.
2 Department of Rehabilitation Medicine, Workers' Compensation and Welfare Incheon Hospital, Incheon, Republic of Korea.
3 Department of Rehabilitation Medicine, National Traffic Injury Rehabilitation Hospital, Yangpyeong, Republic of Korea.
4 Department of Rehabilitation Medicine, Seoul National University College of Medicine, Seoul National University Hospital, Seoul, Republic of Korea. msbang@snu.ac.kr.
5 Department of Rehabilitation Medicine, National Traffic Injury Rehabilitation Hospital, Yangpyeong, Republic of Korea. msbang@snu.ac.kr.