1. Department of Physical Medicine and Rehabilitation Medicine, Hanyang University Medical Center: 222-1 Wangsimni-ro, Seongdong-gu, Seoul 133-792, Republic of Korea
2. Department of Physical Therapy, Shinsung University: 1 Daehack-ro, Jeongmi-myeon, Dangjin-si, Chungcheongnam-do, Republic of Korea