Kang, RyungA
Shin, Byung Seop
Shin, Young Hee
Gil, Nam-Su
Oh, Ye Na
Jeong, Ji Seon http://orcid.org/0000-0001-5396-1030
Article History
Received: 8 June 2018
Accepted: 27 August 2018
First Online: 7 September 2018
Ethics approval and consent to participate
: This retrospective study was approved by the Institutional Review Board of Samsung Medical Center (SMC 2018–02-121) and the requirement for written informed consent was waived.
: Not applicable.
: The authors declare that they have no competing interests.
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