Article History
Received: 15 November 2017
Accepted: 30 April 2018
First Online: 10 May 2018
Ethics approval and consent to participate
: The study complied with the institutional review board regulations at Seoul St. Mary’s Hospital (Catholic medical center office of human research protection program). Written informed consent was obtained from all of the patients before their records were used.
: Dr. Joo is one of the inventors on the patent filed by the Catholic University of Korea covering details in this manuscript but the authors declare that they have no competing interests.
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