Funding for this research was provided by:
National Key R&D Program of China (2017YFF0207800)
Qinghai Science and Technology Program (2017-ZJ-Y06)
Article History
Received: 11 July 2019
Accepted: 9 September 2019
First Online: 15 October 2019
Compliance with Ethical Standards
:
: Lujing Xu declares that she has no conflict of interest. Tong Shu declares that he has no conflict of interest. Songbai Liu 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.
: Not applicable.