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Authors
Kim, Seongtae https://orcid.org/0000-0002-9340-6493
Chae, Sangho https://orcid.org/0000-0002-2344-3643
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Article History
Received: 25 August 2020
Accepted: 11 May 2021
First Online: 24 May 2021
Declarations
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: The authors declare that they have no conflict of interest.
: This study uses publicly available secondary data.
: Informed consent are not required by the universities of the authors.
