Kook, Hyungdon
Joo, Hyung Joon
Park, Jae Hyoung
Hong, Soon Jun
Yu, Cheol Woong
Lim, Do-Sun http://orcid.org/0000-0001-5751-5177
Funding for this research was provided by:
Korea University (K1719491)
Article History
Received: 13 November 2019
Accepted: 6 February 2020
First Online: 18 February 2020
Ethics approval and consent to participate
: This study was approved by the ethical committee of the institutional review board of Korea University Anam Hospital, and the need for written informed consent was waived due to the non-interventional and retrospective nature of the study.
: Not applicable.
: The authors declare that they have no competing interests.