Ki, Hee Jong
Lee, Kwan Sung
Kim, Bum Soo
Choi, Jai Ho http://orcid.org/0000-0001-6838-0343
Shin, Yong Sam
Article History
Received: 19 April 2020
Accepted: 4 June 2020
First Online: 15 June 2020
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: This study was executed 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. This study was approved by the institutional review board at the author’s institute (KC19RASI0866).
: The requirement for written informed consent was waived by the ethics committee due to the study’s retrospective design.