Funding for this research was provided by:
This study has received funding by the Key Projects of the Ministry of Science and Technology (2017YFC0113304)
Article History
Received: 14 January 2020
Revised: 2 April 2020
Accepted: 7 May 2020
First Online: 20 May 2020
Compliance with ethical standards
:
: The scientific guarantor of this publication is Rong Tian, PhD.
: 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. No complex statistical methods were necessary for this paper.
: Written informed consent was waived by the Institutional Review Board because this was a retrospective study.
: The study was approved by the institutional ethics review board of the West China Hospital, Sichuan University.
: • Retrospective• Diagnostic or prognostic study• Performed at one institution