Text and Data Mining valid from 2018-07-20
Received: 25 March 2018
Accepted: 12 July 2018
First Online: 20 July 2018
Ethics approval and consent to participate
: All procedures performed in studies were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards. The study protocol was approved by our institutional review board (CHA Bundang Medical Center, CHA University), and informed consent was acquired from each patient.
: Not applicable.
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