Funding for this research was provided by:
Project of Guangdong Provincial Department of Finance (No.157, No.8)
Postdoctoral Research Foundation of China (No. 2018M633036)
Medical Science and Technology Foundation of Guangdong Province (No. B2019091)
the National Natural Science Foundation of China (No.81873314, No.81974574, No. 81473698)
Key scientific research platforms and research projects of universities in Guangdong Province (No. 2018KQNCX041)
the Science and Technology Research Project of Guangdong Provincial Hospital of Chinese Medicine (No.YN2019ML08, No. YK2013B2N19, YN2015MS15)
Received: 30 January 2020
Accepted: 2 April 2020
First Online: 11 April 2020
Ethics approval and consent to participate
: Since our study is a meta-analysis, an Ethical Review Committee Statement is not required.
: Not applicable.
: The authors declare that they have no competing interests.