1. Department of Internal Medicine; Hanyang University Guri Hospital and Hanyang University College of Medicine; Seoul Korea
2. Department of Radiology and Center for Imaging Science; Samsung Medical Center; Sungkyunkwan University School of Medicine; Seoul Korea
3. Department of Radiology; Ajou University Hospital; Ajou University College of Medicine; Suwon Korea
4. Department of Radiology; Hallym University Dongtan Sacred Heart Hospital; Hallym University College of Medicine; Hwaseong Korea
5. Department of Radiology; Hanyang University Guri Hospital and Hanyang University College of Medicine; Seoul Korea