Cha, Yong-Han
Yoo, Jun-Il http://orcid.org/0000-0002-3575-4123
Article History
Received: 15 February 2021
Accepted: 10 May 2021
First Online: 19 May 2021
Declarations
:
: The design and protocol of this retrospective study were approved by the Institutional Review Board of our hospital (GNUH-2019-05-018-007). The requirement to obtain informed consent was waived by the board. All methods in the study were carried out in accordance with the Helsinki guidelines and declaration.
: Not Applicable.
: All authors have no conflict of interest.