Funding for this research was provided by:
National Natural Science Foundation of China (61571432)
Shenzhen Basic Research Program (JCYJ20170413162354654)
Text and Data Mining valid from 2018-12-06
Received: 1 August 2018
Revised: 18 October 2018
Accepted: 31 October 2018
First Online: 6 December 2018
Compliance with ethical standards
: The scientific guarantor of this publication is Hairong Zheng.
: 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 (Zhi-Cheng Li) has significant statistical expertise.
: Written informed consent was obtained from all patients.
: Institutional Review Board approval was obtained.
: • retrospective• diagnostic or prognostic study• multicenter study