Funding for this research was provided by:
National Natural Science Foundation of China (81572988)
Science & Technology Department of Sichuan Province Funding Project (2016FZ0108 and 2018SZ0117)
Article History
Received: 14 June 2019
Accepted: 23 October 2019
First Online: 12 November 2019
Compliance with ethical standards
:
: The authors declared no conflicts of interest in this work.
: This article does not contain any studies with human participants or animals performed by any of the authors.