Received: 28 May 2020
Accepted: 14 September 2020
First Online: 15 December 2020
Ethics approval and consent to participate
: This study protocol was reviewed and approved by Seoul National University Bundang Hospital the institutional review board (IRB No. B-1707/408–304). Informed consent was obtained from the patients.
: Not applicable.
: The authors declare that they have no competing interests.