1. Department of Rehabilitation Medicine, Hallym University Dongtan Sacred Heart Hospital, Seoul, Korea
2. Department of Rehabilitation Medicine, Dongmasan General Hopsital, Dongmasan, Korea
3. Department of Physical Medicine and Rehabilitation, Soonchunhyang University Bucheon Hospital, Bucheon, Korea
4. Department of Orthopedic Surgery, Seoul National University College of Medicine, Seoul, Korea
5. Department of Rehabilitation Medicine, Seoul National University College of Medicine, Seoul National University Bundang Hospital, Seongnam, Korea