Funding for this research was provided by:
National Natural Science Foundation of China (31471101, 81130075)
Text and Data Mining valid from 2018-11-09
Received: 12 June 2018
Revised: 11 October 2018
Accepted: 23 October 2018
First Online: 9 November 2018
Compliance with ethical standards
: The authors declare that they have no conflicts of interest.
: All procedures performed in studies involving animals were in accordance with the ethical standards of the institution or practice at which the studies were conducted.
: Informed consent was obtained from all individual participants included in the study.