1. Department of Physical Therapy, College of Medical Science, Catholic University of Daegu
2. Department of Pharmacology, College of Pharmacy, Catholic University of Daegu
3. Department of Pharmacology, College of Medicine, Chung-Ang University
4. Department of Physical Therapy, Masan University
5. Department of Physical Therapy, College of Health Science, Korea University: 1 Jeongneung 3-dong, Seongbook-gu, Seoul 136-703, Republic of Korea