Funding for this research was provided by:
National Key R&D Program of China (2017YFB0802300)
National Natural Science Foundation of China (61772403, U1401251)
Natural Science Basic Research Plan in Shaanxi Province of China (2017JM6004)
National 111 Program of China (B16037, B08038)
Article History
Received: 27 February 2018
Accepted: 12 June 2018
First Online: 21 June 2018
Compliance with Ethical Standards
:
: Kai Fan declares that he has no conflict of interest. Shangyang Wang declares that he has no conflict of interest. Yanhui Ren declares that he has no conflict of interest. Hui Li declares that he has no conflict of interest. Yintang Yang declares that he has no conflict of interest.
: This article does not contain any studies with human participants or animals performed by any of the authors.