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Authors
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Funding
Funding for this research was provided by:
National Research Foundation of Korea (NRF-2017R1D1A1B03033380)
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Article History
Received: 12 August 2019
Accepted: 11 December 2019
First Online: 3 January 2020
Compliance with ethical standards
: The study protocol was approved by the Institutional Review Board of Korea University Anam and Guro hospitals (2018AN0278, 2018AN0413). Informed consent was obtained from all participants in this study.
: The authors declare that they have no conflict of interest.
