Si, P.
Zhang, P.
Chen, T.
Liu, G.
Lu, H.
Chen, H.
Wang, C.
Zhai, B.
Article History
Received: 1 November 2018
Accepted: 26 December 2018
First Online: 10 January 2019
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: For the institutional cohorts, de-identified data were extracted from the Henan Provincial People’s Hospital Breast Cancer Database. This article does not contain any studies with human participants performed by any of the authors.
: For this type of study, formal consent is not required.