Ha, Su Min
Chae, Eun Young http://orcid.org/0000-0002-3478-6721
Cha, Joo Hee
Shin, Hee Jung
Choi, Woo Jung
Kim, Hak Hee
Article History
Received: 15 November 2019
Accepted: 23 April 2020
First Online: 1 May 2020
Ethics approval and consent to participate
: This study was approved by the institutional review board of Asan Medical Center (No. 2019–0272), and the need for informed consent was waived due to the retrospective design of the study.
: Not applicable.
: The authors declare that they have no competing interests.