Funding for this research was provided by:
Seoul National University Hospital Research Fund (04-2018-0860)
Received: 29 February 2020
Accepted: 24 September 2020
First Online: 15 October 2020
Ethics approval and consent to participate
: This study protocol was performed in accordance with the Declaration of Helsinki and approved by the Ethics Committee of the Seoul National University Hospital with a waiver of informed consent (No. 1705–113-855).
: Not applicable.
: All authors declare no conflicts of interest.