1. Department of Radiology, Severance Hospital, Research Institute of Radiological Science; Yonsei University, College of Medicine; Seoul Korea
2. Biostastistics Collaboration Unit, Medical Research Center; Yonsei University, College of Medicine; Seoul Korea
3. Department of Pathology; Yonsei University, College of Medicine; Seoul Korea
4. Department of Pathology; Yonsei University, Wonju College of Medicine; Wonju Korea