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Authors
Wu, Yu
Yu, Wenzhou
Wu, Xiuyun
Wan, Huihui
Wang, Ying
Lu, Guohua
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Funding
Funding for this research was provided by:
Department of Education of Shandong Province (Grant number: J17RA137 & J13WH08)
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Article History
Received: 16 April 2020
Accepted: 20 July 2020
First Online: 6 August 2020
Ethics approval and consent to participate
: This study was approved by the ethics committee of Weifang Medical University. All participants signed an informed consent form prior to the administration of questionnaires to participate in the survey. The survey data collection was approved by the six universities in Shandong Province.
: Not applicable.
: The authors declare that they have no competing interests.
