1. Division of Mechanical Engineering, Kyungnam University, Republic of Korea
2. Department of Physical Therapy, Kyungnam University, Republic of Korea
3. Department of Physical Therapy, Hansol Medical Foundation Changwon Hanseo Hospital, Republic of Korea
4. Department of Nursing, Dongseo University, Republic of Korea
5. Department of Nursing, Kyungnam University, Republic of Korea
6. Department of Rehabilitation Medicine, Kangdong Sacred Heart Hospital, Hallym University College of Medicine: 445 Gil-dong, Gangdong-gu, Seoul 134-701, Republic of Korea