1. Department of Rehabilitation Medicine, Graduate School; The Catholic University of Korea; Seoul Republic of Korea
2. Department of Radiology, Seoul St. Mary's Hospital, College of Medicine; The Catholic University of Korea; Seoul Republic of Korea
3. Department of Rehabilitation Medicine, Seoul St. Mary's Hospital, College of Medicine; The Catholic University of Korea; 222, Banpo-daero, Seocho-gu, Seoul 06591 Republic of Korea