Funding for this research was provided by:
New Century Excellent of Guangxi Ten Hundred and Thousand Talent Project (2015130)
Natural Science Foundation of Guangxi Province (2016GXNSFAA380250)
Young and middle-aged teachers’ basic capability improvement project (KY2016LX032)
Article History
Received: 3 January 2018
Accepted: 16 May 2018
First Online: 27 June 2018
Compliance with ethical standards
:
: We declare that we have no conflict of interest.
: The study was approved by ethics committee of hospital.