Zhou, Jianhong
Li, Bo
Han, Yong
Article History
Received: 20 November 2017
Accepted: 12 November 2018
First Online: 14 December 2018
Competing Interests
: Dr Zhou’s work has been funded by Xi’an Jiaotong University. He has received compensation as a employee of Baoji University of Arts and Sciences. Dr Li and Dr Han declare no potential conflict of interest.