Koh, Il Hwan
Seo, Kyoung Yul
Park, Seong Bae
Yang, Hun
Kim, InSik
Nam, Sang Min http://orcid.org/0000-0001-6903-6333
Funding for this research was provided by:
Korea Health Industry Development Institute (HI14C1607010116)
Article History
Received: 31 May 2018
Accepted: 16 July 2018
First Online: 29 July 2018
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. For this retrospective study, formal consent is not required.
: The authors declare that they have no conflict of interest.