Yeo, Joon Hyung
Kim, June-Gone
Article History
Received: 1 February 2020
Revised: 23 March 2020
Accepted: 1 April 2020
First Online: 12 April 2020
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: The study was approved by the Institutional Review Board of the Asan Medical Center (IRB No. 2019-1066) and adhered to the tenets of the Declaration of Helsinki. Due to the retrospective study design and use of de-identified patient data, the need for obtaining written informed consent was waived.
: Not applicable.