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Authors
Mo, Hongnan
Xu, Binghe
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Article History
Received: 25 September 2019
Accepted: 28 November 2019
First Online: 13 August 2020
Compliance with ethics guidelines
: Hongnan Mo and Binghe Xu declare no conflict of interests. All procedures followed were in accordance with the ethical standards of the responsible committee on human experimentation (institutional and national) and with the <i>Helsinki Declaration</i> of 1975, as revised in 2000. Given that this study is a review article, obtaining informed consent was unnecessary.
