Qin, Bei
Yang, Kuan
Funding for this research was provided by:
the National Science Foundations of China (81302706)
National undergraduate innovation and entrepreneurship training program (201611840026)
Shaanxi Science and Technology Fund (2017SF-345)
Scientific research fund of Xi’an Medical University (No.2016YXXK09, 2016DXS1-08, 2018DC-12, 201825012)
Article History
Received: 21 March 2018
Accepted: 23 July 2018
First Online: 9 August 2018
Compliance with ethical standards
: The author(s) declare that they have no competing interests.