Choi, Joon Young
Lim, Jeong Uk
Jeong, Ho Jung
Lee, Ji Eun
Rhee, Chin Kook http://orcid.org/0000-0003-4533-7937
Article History
Received: 4 June 2019
Accepted: 17 January 2020
First Online: 28 January 2020
Ethics approval and consent to participate
: The study was approved by the Ethics Committee of the AFCH (AFCH-18-IRB-008). Informed consent was waived because of the retrospective nature of this study. Accessibility of the database and data review was permitted by the Ethics Committee of the AFCH.
: Not applicable.
: The authors declare that they have no competing interests.