Funding for this research was provided by:
National Research Foundation of Korea (NRF-2017R1A2B1011821, NRF-2016R1A2B4013798)
Ministry of Agriculture, Food and Rural Affairs (2013)
Received: 22 March 2018
Accepted: 26 July 2019
First Online: 27 August 2019
Ethics approval and consent to participate
: The informed written consent for participation was obtained from each individual. The study protocol was approved by the Institutional Review Board of Sangmyung University, Seoul, Korea (approval number: BE2013–8).
: Not applicable.
: The authors declare that they have no competing interests.