Retraction Note: BMC Cancer 19, 500 (2019)

https://doi.org/10.1186/s12885-019-5656-7

The Editor has retracted this article because an investigation by Zheijang University Academic Committee concluded that some of the surgical cases reported were the result of the sharing of clinical data and the ethics approval provided for this study does not cover all the cases included.

All of the authors disagree with this retraction.