1. Korea National Rehabilitation Center Research Institute, National Rehabilitation Center, Republic of Korea
2. Department of Rehabilitation Medicine, Catholic Kwandong University International St Mary’s Hospital, Republic of Korea
3. Department of Physical Therapy, Konyang University, Republic of Korea
4. Department of Rehabilitation Medicine, National Rehabilitation Hospital, National Rehabilitation Center: 520 Insu-dong, Kangbuk-gu, Seoul 142-070, Republic of Korea