Funding for this research was provided by:
the National Major Drug Discovery Project of China (2015ZX09J15102-004)
Received: 11 March 2019
Accepted: 1 July 2019
First Online: 11 July 2019
Ethics approval and consent to participate
: This article does not contain any studies with human participants or animals performed by any of the authors.
: Not applicable.
: The authors declare that they have no competing interests.