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Article History

Received: 1 February 2018

Revised: 17 June 2018

Accepted: 2 July 2018

First Online: 9 August 2018

Ethics approval and consent to participate

: Informed consent was obtained from all subjects, and the experimental protocol was approved by the Institutional Review Board of the Konkuk University of Korea (KUH1010836). The Ethics Committee for the Conduct of Human Research at Seoul St. Mary’s Hospital also approved this study (KC13SISI0791).

: Not applicable.

: The authors declare that they have no competing interests.

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