Funding for this research was provided by:
National Key Research and Development Program of China (2017YFA0205200, 2016YFA0201401, 2016YFC0103702, 2016YFC0102000)
National Natural Science Foundation of China (81227901, 81871514, 81470083, 81527805, 61231004, 81601548, 81772011)
International Innovation Team of CAS (20140491524)
Beijing Municipal Science & Technology Commission (Z161100002616022)
China Postdoctoral Science Foundation funded project (2017M613084)
Shaanxi Postdoctoral Science Foundation funded project (2017BSHEDZZ91)
National Natural Science Foundation of Shaanxi Province (2019JM459, 2018JM7046)
Article History
First Online: 21 June 2019
Compliance with Ethical Standards
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: The authors declare that they have no conflict of interest.