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Funding
Funding for this research was provided by:
Ministry of Health of the People’s Republic of China (NO. WA2005-14)
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Article History
Received: 1 June 2020
Accepted: 31 August 2020
First Online: 10 September 2020
Ethics approval and consent to participate
: Respondents who agreed to be interviewed were then visited and formal informed consent was obtained for interview. No identification information on survey participants was included in this study. The ethics approval was obtained from the Peking University Institution Review Board (NO. IRB00001052-16054). All participants were informed of the voluntary nature of the study and provided verbal consent.
: Not applicable.
: All authors have completed the ICMJE uniform disclosure form at ExternalRef removed and declare no support from any organization for the submitted work, no financial relationships with any organizations that might have an interest in the submitted work in the previous three years, and no other relationships or activities that could appear to have influenced the submitted work.
