Text and Data Mining valid from 2019-01-29
Received: 12 October 2018
Accepted: 22 January 2019
First Online: 29 January 2019
Ethics approval and consent to participate
: The study was approved by the Yonsei University Institutional Review Board (Approval No.: 1040917–201,506-BR-153-03) and conducted in accordance with CONSORT guidelines. Informed written consent was obtained from patients.
: Not Applicable
: The authors declare that they have no competing interests.
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