Kim, Min Hyun
Ihn, Myong Hun
Cho, Jung Rae
Kim, Myung Jo
Kang, Sung Il
Oh, Heung-Kwon
Kim, Duck-Woo
Kang, Sung-Bum
Article History
Accepted: 3 April 2019
First Online: 17 April 2019
Compliance with ethical standards
:
: 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.
: The authors declare that they have no conflict of interest.