Funding for this research was provided by:
National Natural Science Foundation of China (71473129)
Received: 2 May 2017
Accepted: 31 January 2018
First Online: 8 February 2018
Ethics approval and consent to participate
: According to The Ethical Review Policy of Human Biomedical Research issued by China’s former Ministry of Health in 2007, ethics approval did not have to be applied for this study where only individual interviews were conducted [CitationRef removed]. Although no official ethics approval should be sought for this study, the research group did follow standard procedures to obtain oral informed consent from interviewees. Before the interview was conducted, each interviewee was informed that his/her participation was voluntary and anonymous, no private information would be asked, and a digital recorder would be used during the interview. Each interviewee was also informed that he/she had the right to refuse to participate in the interview and the right to terminate participation at any time during the interview. Oral informed consent was obtained from each interviewee.
: Not applicable.
: The authors declare that they have no competing interests.
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