Funding for this research was provided by:
National Research Foundation of Korea (NRF-2016R1A2B3014645)
Article History
Received: 23 July 2020
Revised: 22 September 2020
Accepted: 25 September 2020
First Online: 20 October 2020
Compliance with Ethical Standards
:
: Si Young Yie, Seung Kwan Kang, Donghwi Hwang, and Jae Sung Lee declare that there is no conflict of interest.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. The retrospective use of the scan data was approved by the Institutional Review Board of our institute.
: Waiver of consent was approved by the Institutional Review Board of our institute.