Funding for this research was provided by:
the Western Area Health Initiative (WPCHN1408195)
Chongqing Social Science Planning Project (2013QNL50)
Medical Research Program of Chongqing City Health and Family Planning Committee (2013-2-153)
Received: 31 March 2017
Accepted: 5 February 2018
First Online: 13 February 2018
Ethics approval and consent to participate
: We conducted the research following the Declaration of Helsinki, and the protocol was approved by the Ethics Committee of Chongqing Medical University (Ref. 2014047). All participating primary care doctors signed the informed consent before completing the questionnaire.
: Not applicable.
: The authors declare that they have no competing interests.
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