Funding for this research was provided by:
National Natural Science Foundation of China (81671606, 81501345)
Natural Science Foundation of Liaoning Province (20180550789)
College Scientific Research Project of Education Department of Liaoning Province (LQ2017007)
Dalian Medical University Foundation for Teaching Reform Project of Undergraduate Innovative Talents Training (111507010322)
Article History
Received: 18 September 2019
Revised: 18 October 2019
Accepted: 23 October 2019
First Online: 9 November 2019
Compliance with ethical standards
:
: None.
: Submitted paper is a review of relevant literature. This article does not contain any studies with human participants or animals performed by any of the authors.