Seo, Jong-Geun
Park, Sung-Pa http://orcid.org/0000-0003-1647-7770
Article History
Received: 5 August 2018
Accepted: 23 November 2018
First Online: 1 December 2018
Compliance with ethical standards
:
: The authors declare that they have no competing interests.
: All procedures performed in studies involving human participants 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.
: Informed consent was obtained from all individual participants included in the study.