Chay, Doo Byung http://orcid.org/0000-0002-0648-4021
Han, Gwan Hee http://orcid.org/0000-0001-5263-4855
Nam, Sanghee
Cho, Hanbyoul http://orcid.org/0000-0002-6177-1648
Chung, Joon-Yong
Hewitt, Stephen M.
Article History
Received: 15 March 2019
Accepted: 16 June 2019
First Online: 13 July 2019
Compliance with ethical standards
:
: The authors have no conflict of interest to declare.
: 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.