Funding for this research was provided by:
National Natural Science Foundation of China (51777186)
ORCID
Qun-wei XU: http://orcid.org/0000-0002-4113-0990
Publication History
Received: 2016-05-29
Accepted: 2016-12-04
Crosschecked: 2018-09-09
Content Type
: Article
Copyright
: © Zhejiang University and Springer-Verlag GmbH Germany, part of Springer Nature 2018