Funding for this research was provided by:
Henan province innovation talents of science and technology (184200510020)
Text and Data Mining valid from 2019-04-12
Received: 5 December 2018
Accepted: 9 April 2019
First Online: 12 April 2019
Compliance with ethical standards
: Drs. Bing-Rong Liu, Dan Liu, Wenyi Yang, Saif Ullah, Zhen Cao, Dezhi He, Xuehui Zhang, Yang Shi, Yangyang Zhou, Yong Chen, Donghai He, Lixia Zhao, Yulian Yuan, and Deliang Li have no conflicts of interests or financial ties to disclose.