Funding for this research was provided by:
Jiangsu Top Expert Program in Six Professions (2014-WSW-052)
Jiangsu Provincial Special Program of Medical Science (BE2015612)
Received: 23 October 2017
Accepted: 5 April 2018
First Online: 14 April 2018
Ethics approval and consent to participate
: Ethics approval for this study was obtained from the ethics review committee for human studies of Nanjing First Hospital.This manuscript has been reviewed and approved by all the co-authors, and has not been submitted to any other journals for consideration for publication.
: The patients included in the study provided their informed consent.
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.