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Authors
Chen, Chung-Ming https://orcid.org/0000-0001-8762-8957
Chou, Hsiu-Chu
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Article History
Received: 29 May 2018
Revised: 19 March 2019
Accepted: 24 April 2019
First Online: 13 May 2019
Competing interests
: The authors declare no competing interests.
