Funding for this research was provided by:
the Zhejiang Provincial Natural Science Foundation of China (LY14H160003)
the Scientific Innovation Team Project of Ningbo (2012B82019)
the Ningbo Social Developmental Key Research Project ((2012C5015)
the Ningbo Natural Science Foundation (2012A610208 and 2012A610217)
the Medical and Health Research Project of Zhejiang Province (2012ZDA042 and 2014PYA017)
Received: 25 July 2017
Accepted: 26 February 2018
First Online: 2 March 2018
Ethics approval and consent to participate
: Experimental procedures were reviewed and approved by the Ethics Committee of Ningbo Lihuili Hospital. All participants signed written informed consent documents.
: The authors agree for the publication of this article.
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.