Funding for this research was provided by:
National Natural Science Foundation of China (81227901, 81527805, 61231004, 81501616, 81671851)
the Science and Technology Service Network Initiative of the Chinese Academy of Sciences (KFJ-SW-STS-160)
the International Innovation Team of CAS (20140491524)
Beijing Municipal Science & Technology Commission (Z161100002616022, Z171100000117023)
National Key Research and Development Program of China (2017YFA0205200, 2017YFC1308700, 2106YFC0103702, 2016YFA0201401, 2017YFC1308701, 2017YFC1309100, 2016CZYD0001)
the Instrument Developing Project of the Chinese Academy of Sciences (YZ201502)
National High Technology Research and Development Program of China (2015AA020504)
Text and Data Mining valid from 2018-03-23
Received: 10 July 2017
Revised: 2 November 2017
Accepted: 6 November 2017
First Online: 23 March 2018
Compliance with ethical standards
: The scientific guarantor of this publication is Jie Tian.
: 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.
: Dr. Di Dong from the University of Chinese Academy of Sciences, who is one of the authors, has significant statistical expertise.
: Written informed consent was waived by the Institutional Review Board of Beijing Tiantan Hospital Affiliated to Capital Medical University.
: Institutional Review Board approval was obtained.
: • retrospective• diagnostic or prognostic study• performed at one institution