Sung Ho Jang1, Wan Seok Seo2, Hyeok Gyu Kwon3. 1. Department of Physical Medicine and Rehabilitation, College of Medicine, Yeungnam University, Namku, Daegu, Republic of Korea. 2. Department of Neuropsychiatry, College of Medicine, Yeungnam University, Namku, Daegu, Republic of Korea. 3. Department of Physical Medicine and Rehabilitation, College of Medicine, Yeungnam University, Namku, Daegu, Republic of Korea. Electronic address: khg0715@hanmail.net.