Funding for this research was provided by:
Strategic Priority Research Program (B) of the Chinese Academy of Sciences (XDB26000000)
National Natural Science Foundation of China (41472012)
President's International Fellowship Initiative grant (2018PC0043)
Postdoctoral Research Foundation of China (2018M630616)
Article History
Received: 23 August 2019
Accepted: 12 December 2019
First Online: 8 January 2020
Ethics approval and consent to participate
: Not applicable.
: Not applicable.
: The authors declare that they have no competing interests.