Funding for this research was provided by:
Natural Science Foundation of Jiangsu Province (BK20151106)
Wuxi Key Medical Tallents (ZDRC032)
Text and Data Mining valid from 2019-04-30
Received: 18 February 2019
Revised: 3 April 2019
Accepted: 4 April 2019
First Online: 30 April 2019
Compliance with ethical standards
: The scientific guarantor of this publication is Gen Yan, M.D., Ph.D.
: The authors of this manuscript declare no relationships with any companies, whose products or services may be related to the subject matter of the article.
: Yinghua Xuan kindly provided statistical advice for this manuscript.
: Written informed consent was waived by the Institutional Review Board.
: Institutional Review Board approval was obtained.
: • Retrospective• Case-control study• Performed at one institution