Funding for this research was provided by:
National Natural Science Foundation of China (81401438)
LIAONING Science & Technology Project (2017225012)
Article History
Received: 1 May 2019
Revised: 12 July 2019
Accepted: 16 August 2019
First Online: 6 September 2019
Compliance with ethical standards
:
: The scientific guarantor of this publication is Dr. Hongzan Sun.
: 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.
: An expert in statistics Dr. Qijun Wu kindly provided statistical advice for this manuscript.
: Written informed consent was obtained from all patients in this study.
: Institutional Review Board approval from Ethics Committee of Shengjing Hospital affiliated to China Medical University (Shenyang, China) was obtained.
: • prospective• prognostic study• performed at one institution