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Authors
Lee, Jung Kwon
Byun, Hee-Guk https://orcid.org/0000-0001-8587-6834
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Funding
Funding for this research was provided by:
Ministry of Land, Transport and Maritime Affairs
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More Information
Article History
Received: 24 June 2019
Accepted: 13 September 2019
First Online: 29 October 2019
Ethics approval and consent to participate
: Not applicable.
: Not applicable.
: The authors declare that they have no competing interests.
