Received: 3 October 2016
Accepted: 5 February 2018
First Online: 13 February 2018
Ethics approval and consent to participate
: Ethical approval was obtained from Kunming Medical University Ethics Review Board. In Qualitative Phase, all participants provided their written informed consent to contribute to the study. In Quantitative Phase, all participants read the purpose statement of the survey and agreed verbally.
: Not applicable.
: The authors declare that they have no competing interests.
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