Funding for this research was provided by:
National Natural Science Foundation of China (81370945, 81572342, 81570871, 81572409)
Natural Science Foundation of Guangdong Province (2015A030313103, 2015A030313029, 2016A030311035, 2014A030313073)
Guangdong Science and Technology Department (2017A020215075)
Fundamental Research Funds for Central Universities of the Central South University (13ykpy06)
Fundamental Research Funds for the Central Universities (16ykpy2)
Text and Data Mining valid from 2019-09-11
Received: 25 May 2019
Accepted: 5 September 2019
First Online: 11 September 2019
Consent for publication
: Not applicable.
: The authors declare no conflict of interest.