1. Department of Physical Medicine and Rehabilitation, Inje University College of Medicine, Sanggye Paik Hospital, Seoul, South Korea
2. Department of Family Medicine, Inje University College of Medicine, Sanggye Paik Hospital, Seoul, South Korea
3. Institute of Rehabilitation Medicine, SRC Rehabilitation Hosipital Gwangju, Gyeonggi-do, South Korea
4. Department of Anesthesiology, Inje University College of Medicine, Sanggye Paik Hospital, Seoul, South Korea