Funding for this research was provided by:
National Natural Science Foundation of China (31572523)
National Basic Research Program of China (973 Program) (2016YFD0500800)
Received: 31 January 2019
Accepted: 8 May 2019
First Online: 24 May 2019
Ethics approval and consent to participate
: All animal experiments were conducted in strict accordance with the Guidelines on the Humane Treatment of Laboratory Animals and were approved by the Institutional Animal Care and Use Committee of the Shanghai Veterinary Research Institute (Permit No: Shvri-Po-0080).
: The authors declare that they have no competing interests.