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Article History

Received: 10 June 2020

Revised: 8 September 2020

Accepted: 12 November 2020

First Online: 25 November 2020

Compliance with ethical standards

:

: The scientific guarantor of this publication is Hyae Young Kim.

: Activities related to the present article: none.Activities not related to the present article: HK received a research grant from Lunit. JMG received research grants from Lunit, Infinitt Healthcare, and Dongkook Lifescience.

: No complex statistical methods were necessary for this paper.

: Written informed consent was obtained from all subjects (patients) in this study.

: This study was approved by the institutional review boards of the participating medical centers in South Korea, which were National Cancer Center, Daegu-Gyeongbuk Regional Cancer Center, Daejeon Regional Cancer Center, Gangwon Cancer Center, Incheon Regional Cancer Center, Jeonbuk Regional Cancer Center, Jeju Regional Cancer Center, Jeonnam Regional Cancer Center, Gyeonggi Cancer Center, Kyunghee University Hospital, Korea University Guro Hospital, Busan Regional Cancer Center, Seoul National University Hospital, and Ulsan Cancer Center (representative IRB No. NCC2017-0078).

: Some study subjects or cohorts have been previously reported (<i>Radiology</i> 10.1148/radiol.2020192283:192283; <i>Eur Radiol</i> 10.1007/s00330-020-06707-x; Unpublished work by Hwang et al [submitted state]).

: • retrospective• diagnostic or prognostic study• multicenter study