1. Department of Radiology, Ansan Hospital, Korea University College of Medicine, 123 Jeokgeum-ro, Danwon-gu, Ansan-si, Gyeonggi, 15355, South Korea.
2. Medical Science Research Center, Ansan Hospital, Korea University College of Medicine, Ansan-si, South Korea.
3. Radiological Science, Catholic University of Daegu, Gyeongsangbuk-do, South Korea.