Kim, Nak Tscheol
Lee, Young Tae
Park, Moon Seok
Lee, Kyoung Min
Kwon, Oh Sang
Sung, Ki Hyuk http://orcid.org/0000-0002-5007-2403
Article History
Received: 12 January 2021
Accepted: 1 February 2021
First Online: 8 February 2021
Ethics approval and consent to participate
: This retrospective study was approved by the institutional review board of our hospital (B-1910/568-111), and informed consent was waived owing to the retrospective nature of the study.
: Not applicable
: The authors declare no competing interests.