Funding for this research was provided by:
Health Science Research Foundation of Yunnan Province
Research Innovation Team of Yunnan Province (2018HC084)
Medical Academic Leader Training Program of Yunnan Province (D201618)
the Outstanding Youth Scientists and Technicians Training Program of Yunnan Province
Received: 30 June 2019
Accepted: 30 October 2019
First Online: 2 December 2019
Ethics approval and consent to participate
: The study was approved by the Ethics Board of the 1st Affiliated Hospital of Kunming Medical University (NO. 2018NS01).
: Not applicable
: The authors declare that they have no competing interests.