1. Department of Physical Medicine and Rehabilitation, Myongi Hospital, Seoul, Korea.
2. Department of Biomedical Engineering, Hanyang University, Seoul, Korea.
3. Sol Hospital Sports Medicine and Rehabilitation Center, Seoul, Korea.
4. Department of Psychology, Chung-Ang University College of Liberal Arts, Seoul, Korea.
5. Department of Physical Medicine and Rehabilitation, Yonsei University College of Medicine, Seoul, Korea.