Funding for this research was provided by:
Natural Science Foundation of Hunan Province (2016JJ4068)
Education Department of Hunan Province (16A160)
Article History
Received: 7 April 2018
Revised: 13 November 2018
Accepted: 9 December 2018
First Online: 17 January 2019
Compliance with ethical guidelines
:
: T. Zhan, M. Daniyal, J. Li, and Y. Mao declare that they have no competing interests.
: This article does not contain any studies with human participants or animals performed by any of the authors.