Xu, ZhengHu
Kim, Bum Soo
Lee, Kwan Sung
Choi, Jai Ho http://orcid.org/0000-0001-6838-0343
Shin, Yong Sam
Article History
Received: 8 April 2019
Accepted: 21 June 2019
First Online: 29 June 2019
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional research committee and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards.
: For this type of study, formal consent is not required.