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Authors
Zhang, Liangwen
Zeng, Yanbing
Fang, Ya
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Funding
Funding for this research was provided by:
the Project of Fujian Province Natural Science Fund (2017J01133)
the Project of National Natural Science Fund (71874147, 81573257)
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Article History
Received: 26 November 2018
Accepted: 29 August 2019
First Online: 5 September 2019
Ethics approval and consent to participate
: The study protocol was approved by the ethical review committee of School of Public Health, Xiamen University. All participants read a statement that explained the purpose of the survey and provided written informed consent before participation in the study.
: Not applicable.
: The authors declare that they have no competing interests.
