1. Department of Radiology, Soonchunhyang University College of Medicine, Cheonan Hospital, Cheonan-si, South Korea
2. Department of Radiology, Korea University Ansan Hospital, Ansan-si, Gyeonggi-do, South Korea
3. Department of Radiology, University of Ulsan College of Medicine, Gangneung Asan Hospital, Gangneung-si, Gangwon-do, South Korea
4. Vascular Center, The Eutteum Orthopedic Surgery Hospital, Paju-si, South Korea