Kim, Hyung-Jun
Lee, Jong Sik
Kwak, Nakwon
Cho, Jaeyoung
Lee, Chang-Hoon
Han, Sung Koo
Yim, Jae-Joon
Article History
Received: 12 October 2018
Accepted: 31 October 2019
First Online: 11 November 2019
Ethics approval and consent to participate
: The study was conducted in accordance with the amended Declaration of Helsinki and was approved by the institutional review board of Seoul National University Hospital (protocol number: H-1705-017-851). Informed consent was waived because of the retrospective design of the study, and the information of each patient was anonymized prior to analyses.
: Not applicable.
: The authors declare that they have no competing interests.