Joung, Kyung-in
Cho, Sung-il
Article History
Received: 24 February 2017
Accepted: 19 January 2018
First Online: 1 March 2018
Ethics approval and consent to participate
: Ethics approval to conduct the study was received from SNU Bioethics Deliberation Committee, Seoul National University (IRB No. E1701/001-001).The authors assert that all procedures contributing to this work comply with the ethical standards of the relevant national and institutional committees on human experimentation and with the Helsinki Declaration of 1975, as revised in 2008.
: Not applicable.
: The authors declare that they have no competing interests.
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