1 Department of Radiology and Center for Imaging Science, Samsung Medical Center, Sungkyunkwan University School of Medicine, Chuncheon, Korea; Department of Radiology, Kangwon National University Hospital, Seoul, Korea.
2 Department of Radiology and Center for Imaging Science, Samsung Medical Center, Sungkyunkwan University School of Medicine, Chuncheon, Korea. Electronic address: hoyunlee96@gmail.com.