Funding for this research was provided by:
National Natural Science Foundation of China (81871278, 81671616, 81471603)
Science and Technology Projects of Nantong City (MS1201712-2)
Text and Data Mining valid from 2019-08-13
First Online: 13 August 2019
Compliance with ethical standards
: The authors declare that they have no conflict of interest.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committees and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
: Informed consent was obtained from all individual participants included in the study.