Funding for this research was provided by:
Ministry of Science, ICT and Future Planning (2017R1C1B5018349)
Article History
Received: 30 October 2017
Accepted: 30 May 2018
First Online: 19 June 2018
Ethics approval and consent to participate
: Ethical approval was waived by the Institutional Review Board of Ewha Womans Medical Center (EUMC 2018–01-004). The need for consent was waived by the IRB, since the study was a retrospective plaster model study.
: The authors declare that they have no competing interests.
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