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Authors
Jing, Jingfeng
Feng, Ran
Zhang, Xiaojun
Li, Ming
Gao, Jinnan
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Article History
Received: 12 December 2019
Accepted: 7 April 2020
First Online: 18 April 2020
Compliance with ethical standards
:
: The authors declare that they have no conflicts of interest.
: 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. The investigations conducted in this study comply with the current laws of the country in which they were performed.
: Informed consent was obtained from all individual participants included in the study.
