Funding for this research was provided by:
National Natural Science Foundation of China (81227901, 81527805, 61231004 and 81671851, 81701681, 11705112, 81771924, 81501616, 81471652; 81771824)
Natural Science Foundation of Shanxi Province (201601D021162)
National Key R&D Program of China (2017YFC1308700, 2017YFA0205200, 2017YFC1309100)
PrecisionMedicine Key Innovation Team Project (YT1601)
Social Development Projects of Key R&D Program in Shanxi Province (201703D321016)
Text and Data Mining valid from 2019-04-10
Received: 1 October 2018
Revised: 12 December 2018
Accepted: 31 January 2019
First Online: 10 April 2019
Compliance with ethical standards
: The scientific guarantor of this publication is Hui Zhang.
: 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.
: One of the authors has significant statistical expertise.
: Written informed consent was not required for this study because this is a retrospective study and patient data are anonymized.
: Institutional Review Board approval was obtained.
: • retrospective• diagnostic or prognostic study• performed at one institution