Funding for this research was provided by:
National Natural Science Foundation of China (81871520)
the China Postdoctoral Science Foundation (230210513)
Article History
Received: 22 June 2019
Accepted: 25 September 2019
First Online: 21 December 2019
Compliance with ethics guidelines
: Zhao-ming LI, Hui LIU, Wen-zhu ZHANG, and Hong LIU declare that they have no conflict of interest.
: This study was approved by the Science and Ethics Committee of School of Biological Science and Medical Engineering in Beihang University, Beijing, China (Approval ID: BM20180003). All procedures followed were in accordance with the ethical standards of the responsible committee on human experimentation (institutional and national) and with the Helsinki Declaration of 1975, as revised in 2008 (5). Informed consent was obtained from all participants for being included in the study.