Funding for this research was provided by:
The National Natural Sciences Foundation of China (21462057, 21172267)
Guizhou Science and Technology Department (QKHLH-2014-7555)
Article History
Received: 3 July 2018
Accepted: 3 September 2018
First Online: 7 September 2018
Compliance with ethical standards
:
: There was no conflict of interest.