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Authors
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Funding
Funding for this research was provided by:
Jining Science and Technology Bureau (2017SMNS007)
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Article History
Received: 6 September 2020
Accepted: 25 December 2020
First Online: 6 January 2021
Ethics approval and consent to participate
: The Human Ethics Committee of the Affiliated Hospital of Jining Medical University (Shandong, China) reviewed and approved this study. The research objective was described to at least one parent or guardian of all participants, and they provided written informed agreement.
: All authors have read and approved the content, and they agree to submit it for consideration for publication in the journal.
: The authors declare that they have no competing interests.
