Funding for this research was provided by:
National Natural Science Foundation of China (61175008, 61673265)
the National Basic Research Program (973) of China (61331903)
ORCID
Zong-feng QI: http://orcid.org/0000-0001-7031-8477
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Publication History
Received: 2016-07-04
Accepted: 2017-01-23
Crosschecked: 2017-12-20
Content Type
: Article
Copyright
: © Zhejiang University and Springer-Verlag GmbH Germany 2017