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Qin, Kongji https://orcid.org/0000-0003-0490-9986
Li, Guofang
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Article History
First Online: 20 May 2020
Compliance with Ethical Standards
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: There is no conflict of interest involved in this study.
: This study was approved by the Institutional Review Board (IRB) at Michigan State University’s Office of Regulatory Affairs (IRB# 14-862). All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
: Informed consent was obtained from all individual participants included in the study.
