Funding for this research was provided by:
National Key R&D Program of China (2017YFC0908900)
National Natural Science Foundation of China (81700485)
Article History
Received: 21 March 2019
Accepted: 20 June 2019
First Online: 9 July 2019
Compliance with ethical standards
:
: Changzhou Cai, Xin Song, Yishu Chen, Xueyang Chen and Chaohui Yu declare that they have no conflict of interest.
: All procedures were in accordance with the ethical standards of institutional and national committee on human experimentation and with the 1964 Helsinki Declaration and its later amendments. There was no interaction with patients directly, as we acquired data from already published articles.
: Informed consent was obtained from all individual participants included in the study.