Gu, Jiulian
Liu, Shousheng
Du, Shuixian
Zhang, Qing
Xiao, Jianhan
Dong, Quanjiang
Xin, Yongning http://orcid.org/0000-0002-3692-7655
Funding for this research was provided by:
National Natural Science Foundation of China (31770837)
Qingdao, Shinan District Science and Technology Development Project Fund (2016-3-016-YY)
Article History
Received: 15 October 2018
Revised: 21 January 2019
Accepted: 5 February 2019
First Online: 21 March 2019
Compliance with ethical standards
:
: The scientific guarantor of this publication is Yongning Xin.
: 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.
: Qing Zhang as an expert in statistics and radiology, who worked at Qingdao Municipal Hospital, gave us much guidance of statistics and biometry.
: Written informed consent was not required for this study because this study was a meta-analysis.
: Institutional Review Board approval was not required because this study was a meta-analysis.
: • Retrospective• Multicenter study