Text and Data Mining valid from 2017-02-01
Received: 21 December 2016
Accepted: 20 February 2017
First Online: 27 February 2017
Compliance with Ethics Guidelines
: The authors declare that they have no conflict of interest. Animal experiments in this study were approved by the ethics committees of Wuhan Institute of Virology, Chinese Academy of Sciences (Approval number: WIVH01201 501).