Funding for this research was provided by:
Catholic University of Korea (ZC16QISI0237)
Ministry of Health and Welfare (HI16C0483)
Article History
Received: 20 March 2017
Accepted: 10 April 2018
First Online: 20 April 2018
Ethics approval and consent to participate
: Ethical approval was given by the Institutional Review Board (IRB) of The Catholic University of Korea and Seoul St. Mary’s Hospital (IRB number: KC15EISI0103). Written informed consent was obtained from all individual participants included in the study, who were guaranteed anonymity.
: SJ, TY, TR, and JH declare that they have no competing interests.
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