Funding for this research was provided by:
Hallym University Medical Center (Hallym University Medical Center Research Fund 2018-58)
Received: 19 April 2019
Accepted: 8 July 2020
First Online: 16 July 2020
Ethics approval and consent to participate
: The local Institutional Review Board/Ethics Committee of Hallym University Sacred Heart Hospital approved the study protocol (IRB No: 2012-I044), and all of the study procedures adhered to the Declaration of Helsinki. Written informed consent was obtained from all patients.
: Not applicable.
: The authors declare that they have no competing interests.