Jang, Seong Hwa
Kwon, Doo Hyuk
Han, Moon-Ku
Park, Hyungjong
Sohn, Sung-Il
Choi, Huimahn
Hong, Jeong-Ho
Article History
Received: 28 November 2020
Accepted: 2 February 2021
First Online: 15 February 2021
Ethics approval and consent to participate
: The protocol for data collection was approved by the Institutional Review Board (IRB) of Keimyung University Dongsan Hospital (IRB number 2017–05-042). Our study was implemented in accordance with the ethical standards of the 1964 Declaration of Helsinki and its lateral amendments. The need for written informed consent was waived because of the retrospective nature of this study. IRB of Keimyung University Dongsan Hospital (IRB number 2017–05-042) waived the need for informed consent.
: Not Applicable.
: The authors declare that they have no competing interests.The authors declared no potential conflicts of interest with respect to the research, authorship, and/or publication of this article.