Funding for this research was provided by:
National Natural Science Foundation of China (81601765)
Jiangsu Province Postdoctoral Science Foundation (1601155B)
Received: 29 October 2019
Accepted: 12 May 2020
First Online: 26 May 2020
Ethics approval and consent to participate
: This research work constitutes a meta-analysis of published data and does not include any studies with human participants or animals performed by any of the authors. Hence, no informed consent was required to perform this study.
: Not applicable.
: The authors declare that they have no competing interests.