1. From the Department of Radiology, Gangnam Severance Hospital, Yonsei University College of Medicine, 211 Eonju-ro, Gangnam-gu, 06273 Seoul, Republic of Korea (N.L.E., E.J.S., J.H.Y., J.A.K., H.M.G.); Department of Radiology, Hanyang University, College of Medicine, Seoul, Republic of Korea (N.L.E., J.S.P.); and Department of Healthcare Information Technology, Inje University, Gimhae, Republic of Korea (D.K.).