Funding for this research was provided by:
National Research Foundation of Korea (NRF-2015R1A5A1009701, NRF-2018R1D1A1B05047274, NRF-2016M3A9B6)
Konkuk University (Konkuk University Researcher Fund in 2018)
Article History
Received: 1 April 2020
Revised: 7 April 2020
Accepted: 9 April 2020
First Online: 21 May 2020
Compliance with ethical standards
:
: The authors declare that they have no financial or commercial conflicts of interest that are directly related to the content of this article.
: All the authors declare that there are no ethical issues for humans and animals.