Funding for this research was provided by:
National Natural Science Foundation of China (31900981, 31871005, 31530026)
Chinese Academy of Sciences (YJKYYQ20180048)
the Strategic Priority Research Program (XDPB29040101)
the Key Research Program of Frontier Sciences, CAS (QYZDY-SSW-SMC013)
National Key Research and Development Program of China (2017YFA0205200)
Youth Innovation Promotion Association of the Chinese Academy of Sciences (2019093)
Article History
Received: 6 June 2019
Accepted: 12 October 2019
First Online: 15 November 2019
Compliance with ethical standards
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: The authors declare that they have no competing interests.