Funding for this research was provided by:
the Priority Academic Program Development of Jiangsu Higher Education Institutions (JX10231801)
The Innovation Capability Development Project of Jiangsu Province (No. BM2015004)
Jiangsu Biobank of Clinical Resource (BM2015004)
Received: 29 May 2019
Accepted: 26 August 2019
First Online: 21 October 2019
Ethics approval and consent to participate
: This study is a meta-analysis of randomized controlled trials and the IRB approval and informed consent is unnecessary.
: Not applicable.
: The authors declare that they have no competing interests.