Funding for this research was provided by:
National Natural Sciences Foundation of China (81371848)
the Infective Diseases Prevention and Cure Project of China (2017ZX10303404–002)
Text and Data Mining valid from 2018-09-04
Received: 2 May 2018
Accepted: 30 July 2018
First Online: 4 September 2018
Ethics approval and consent to participate
: This study was carried out in strict accordance with the National Natural Science Foundation of China ethical guidelines for biomedical research involving living animals and human subjects.
: Not applicable.
: The authors declare that they have no competing interests.