Funding for this research was provided by:
National Natural Science Foundation of China (61571036, 81601457, 61872030, 61571036, 81601457)
Article History
Received: 7 September 2019
Revised: 23 January 2020
Accepted: 20 February 2020
First Online: 28 March 2020
Compliance with ethical standards
:
: The scientific guarantor of this publication is Houjin Chen.
: 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.
: No complex statistical methods were necessary for this paper.
: 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