Funding for this research was provided by:
National Natural Science Foundation of China (81571751, 81571753, 61771266, 81701780)
Natural Science Foundation of Inner Mongolia (2017MS(LH)0814)
Fundamental Research Funds for the Central Universities (JB151204)
Innovation Fund Project of Inner Mongolia University of Science and Technology (2015QNGG03)
The program for Young Talents of Science and Technology in Universities of Inner Mongolia Autonomous Region (NJYT-17-B11)
The program of Science and Technology in Universities of Inner Mongolia Autonomous Region (NJZY17262)
National Natural Science Foundation of Shaanxi Province (2018JM7075)
Text and Data Mining valid from 2018-08-08
First Online: 8 August 2018
Compliance with ethical standards
: Informed consent was obtained from all individual participants included in the study.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
: The authors report no biomedical financial interests or potential conflicts of interest.