1. Department of Rehabilitation Medicine; National Medical Center; Seoul Republic of Korea
2. Department of Biomedical Engineering; Seoul National University College of Medicine; Seoul Republic of Korea
3. Mechanic & Molecular Myology Laboratory, Department of Rehabilitation Medicine; Seoul National University Bundang Hospital; 173-82, Gumi-ro, Bundang-gu, Seongnam-si Gyeonggi-do 13620 Republic of Korea