Na DG, Baek JH, Jung SL, Kim JH, Sung JY, Kim KS, Lee JH, Shin JH, Choi YJ, Ha EJ, Lim HK, Kim SJ, Hahn SY, Lee KH, Choi YJ, Youn I, Kim YJ, Ahn HS, Ryu JH, Baek SM, Sim JS, Jung CK, Lee JH, Korean Society of Thyroid Radiology (KSThR) and Korean Society of Radiology