Lao, Yongfeng
Hou, Lijuan
Li, Jing
Hui, Xu
Yan, Peijing
Yang, Kehu
Funding for this research was provided by:
National Social Science Fund of China (19ZDA142)
Fundamental Research Funds for the Central Universities (18LZUJBWZX006, 2019jbkyzy002)
National Innovation and Entrepreneurship Training Program for Undergraduate (201910730215)
Article History
Received: 24 March 2020
Accepted: 16 May 2020
First Online: 1 June 2020
Compliance with ethical standards
:
: The authors declare that they have no competing interests.
: As this study was a meta-analysis based on published studies, as such, did not involve human or animal participants. And there is no need for an ethical approval or informed consent requested by animal and human experiments.
: For this type of study: a systematic review based on published studies, informed consent is not required.