1. Department of Radiology, Seoul St. Mary's Hospital, College of Medicine; The Catholic University of Korea; 222 Banpo-daero, Seocho-gu Seoul 06591 South Korea
2. Cancer Research Institute, College of Medicine; The Catholic University of Korea; 222 Banpo-daero, Seocho-gu Seoul 06591 South Korea
3. Department of Surgery, Seoul St. Mary's Hospital; The Catholic University of Korea; 222 Banpo-daero, Seocho-gu Seoul 06591 South Korea
4. Department of Surgery, Uijeongbu St. Mary's Hospital; The Catholic University of Korea; Cheonbo-ro 271 Uijeongbu-si, Gyeonggi-do 11765 South Korea