1. Department of Rehabilitation Medicine, Dongguk University Ilsan Hospital, Goyang, Korea.
2. Department of Physical Medicine and Rehabilitation, Soonchunhyang University Bucheon Hospital, Bucheon, Korea.
3. Department of Rehabilitation Medicine, Seoul National University Bundang Hospital, Seongnam, Korea.
4. Department of Rehabilitation Medicine, Seoul National University Hospital, Seoul, Korea.
5. Department of Rehabilitation Medicine, Seoul National University Boramae Medical Center, Seoul, Korea.
6. Red Cross College of Nursing, Chung-Ang University, Seoul, Korea.
7. Department of Rehabilitation Medicine, Ewha Womans University Medical Center, Seoul, Korea.
8. Department of Rehabilitation Medicine, National Rehabilitation Center, Seoul, Korea.