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Authors
Choe, Myong-Song
Ri, Kang-Song
Ryang, Kyong-Il
Choe, Un-Chol
Ri, Chol-Guk
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Article History
Received: 5 May 2022
Accepted: 1 January 2023
First Online: 18 February 2023
Declarations
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: The authors have not disclosed any conflict of interests.
