Moon, Hye Hyeon
Kim, Ho Sung
Park, Ji Eun
Kim, Young-Hoon
Kim, Jeong Hoon
Article History
Received: 8 February 2021
Accepted: 24 May 2021
First Online: 1 June 2021
Declarations
:
: The protocol for this retrospective study followed the Helsinki declaration and was approved by the institutional review board of Asan Medical Center, Seoul, Korea (IRB No. 2020–0363). Informed consent was waived by the same ethics committee that approved this study (the institutional review board of Asan Medical Center, Seoul, Korea).
: Not applicable.
: The authors declare that they have no competing interests.