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Authors
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Funding
Funding for this research was provided by:
Ministry of Education (NRF-2018R1D1A1B07045249)
Rural Development Administration (Project PJ01323201)
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Article History
Received: 3 October 2019
Accepted: 25 November 2019
First Online: 3 December 2019
Ethics approval and consent to participate
: Not applicable.
: Not applicable.
: The authors declare that they have no competing interests.
