Liu, Yingnan
Xue, Hanyue
Liu, Jinghan
Wang, Qinzhi
Wang, Li
Funding for this research was provided by:
the Fundamental Research Funds for the Northwest A&F University (Z111021601)
Young Thousand Talented Program (A279021724)
Article History
Received: 28 October 2017
Accepted: 3 January 2018
First Online: 25 January 2018
Compliance with ethical standards
: The authors declare that they have no competing interests.