Funding for this research was provided by:
National Natural Science Foundation of China (No.30872433)
Text and Data Mining valid from 2019-03-30
Received: 24 January 2019
Accepted: 15 March 2019
First Online: 30 March 2019
Compliance with Ethical Standards
: All protocols of animal experiments were reviewed and approved by the Institutional Animal Care and Use Committee of Shandong University. Animals were treated in accordance with the Guide for the Care and Use of Laboratory Animals (8th edition, National Academies Press).
: The authors declare that they have no conflict of interest.