Funding for this research was provided by:
Interdisciplinary clinical research project of Peking University First Hospital (2017CR21)
Article History
Received: 4 April 2019
Revised: 3 July 2019
Accepted: 18 July 2019
First Online: 5 August 2019
Compliance with ethical standards
:
: The scientific guarantor of this publication is Xiaodong 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 waived by the Institutional Review Board.
: Institutional Review Board approval was obtained.
: • retrospective• diagnostic or prognostic study• performed at one institution