Li, Yiming
Liu, Xing
Qian, Zenghui
Sun, Zhiyan
Xu, Kaibin
Wang, Kai
Fan, Xing
Zhang, Zhong
Li, Shaowu
Wang, Yinyan
Jiang, Tao http://orcid.org/0000-0002-7008-6351
Article History
Received: 9 October 2017
Revised: 25 November 2017
Accepted: 20 December 2017
First Online: 5 February 2018
Compliance with ethical standards
:
: The scientific guarantor of this publication is Tao Jiang.
: 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.
: Mr. Kaibin Xu kindly provided statistical advice for this manuscript.
: Written informed consent was not required for this study since the data were collected retrospectively.
: Ethical approval for this retrospective study was obtained from the institutional review board of Beijing Tiantan Hospital.
: • retrospective• diagnostic or prognostic study• multicentre study