Ahn, Jonghwa
Song, Eyun
Kim, Won Gu
Kim, Tae Yong
Kim, Won Bae
Shong, Young Kee
Jeon, Min Ji
Article History
Received: 27 August 2019
Accepted: 15 November 2019
First Online: 27 November 2019
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: The study protocol was approved by the Institutional Review Board (IRB) of the Asan Medical Center. The IRB of the Asan Medical Center confirms that patient consent was not required for this retrospective study.