Received: 5 April 2018
Accepted: 8 October 2018
First Online: 1 November 2018
Ethics approval and consent to participate
: All procedures were in accordance with the ethical standards of the responsible committee on human experimentation (Approved IRB number of Korea Centers for Disease Control and Prevention in Korea: 2013-01CON-19-P). Informed written consent was obtained from all patients.
: All patients consented to the publication of their data.
: The authors declare that they have no competing interests.
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