Funding for this research was provided by:
National Natural Science Foundation of China (61601477, 61601482)
ORCID
Shan WANG: http://orcid.org/0000-0002-2435-3260
Publication History
Received: 2017-01-10
Accepted: 2017-04-02
Crosschecked: 2017-11-25
Content Type
: Article
Copyright
: © Zhejiang University and Springer-Verlag GmbH Germany 2017