Funding for this research was provided by:
Ministry of Education (2016R1A6A1A03010528)
Article History
Received: 12 October 2018
Accepted: 12 April 2019
First Online: 26 April 2019
Ethics approval and consent to participate
: The study was conducted in adherence to the Declaration of Helsinki as well as under the approval of the Institutional Review Board of Seoul St. Mary’s Hospital (IRB #KC17<b>RESI</b>0439). The informed consent was waived in this retrospective study.
: Not applicable.
: The authors declare that they have no competing interests.
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