Funding for this research was provided by:
National Research Foundation of Korea (NRF-2015R1D1A3A01015641, NRF-2015R1D1A1A02060346)
Ministry of Health & Welfare, Korea (HA17C0035)
Kangwon National University (2015 Research Grant)
Article History
Received: 22 November 2018
Accepted: 3 January 2019
First Online: 17 January 2019
Compliance with ethical standards
:
: The authors declare no conflict of interest.
: This article does not contain any studies with human participants or animals performed by any of the authors.