Article History
Received: 11 March 2018
Accepted: 31 October 2018
First Online: 20 November 2018
Compliance with Ethical Standards
:
: Yeon Soo Kim declares that he has no conflict of interest. Kwang Hyun Ra declares that he has no conflict of interest. Kyle McLean declares that he has no conflict of interest.
: 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.