Jang, Tae-Kyu
Kim, Dae-Yeon
Lee, Shin-Wha
Park, Jeong-Yeol
Suh, Dae-Shik
Kim, Jong-Hyeok
Kim, Yong-Man
Kim, Young-Tak
Nam, Joo-Hyun
Article History
Received: 6 September 2017
Accepted: 9 July 2018
First Online: 7 August 2018
Ethics approval and consent to participate
: This study was approved by the Institutional Review Board (IRB) of Asan Medical Center in Korea and is specified in our manuscript. (IRB approval No. 2017–0832) Patient information was coded and anonymized. In addition, due to the retrospective nature of our study and the use of data from patients who had already died, patient consent was not necessary.
: Not applicable.
: The authors declare that they have no competing interests.
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