Funding for this research was provided by:
Supporting Fund for Teachers' Research of Jining Medical University (JYFC2018JS009)
National Natural Science Foundation of China (31270337)
Jilin Scientific and Technological Development Program (20190201157JC)
Article History
Received: 10 August 2019
Accepted: 29 October 2019
First Online: 23 November 2019
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.