Xiang, Ling
Zhang, Feng
Chen, Chunyan
Cai, Changqun
Funding for this research was provided by:
National Natural Science Foundation of China (21775132)
Scientific Research Foundation of Hunan Provincial Education Department (16A204)
National Natural Science Foundation of Hunan province (2018JJ2388)
Article History
Received: 26 April 2019
Accepted: 9 June 2019
First Online: 6 July 2019
Compliance with ethical standards
: The author(s) declare that they have no competing interests.