Funding for this research was provided by:
Innovation group project of AIDS research in Yunnan province (2014HC019)
Doctoral innovation and science foundation of Kunming Medical University (2017B001)
Text and Data Mining valid from 2019-01-17
Received: 17 November 2017
Accepted: 10 January 2019
First Online: 17 January 2019
Ethics approval and consent to participate
: Because the study was based on aggregate data, ethical approval was not required. All data used in this study were obtained through approvals from Yunnan AIDS Prevention Bureau.
: Not applicable.
: The authors declared that they have no competing interests.
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