In this article (Cancer Res 2011;71:603–13), which was published in the January 15, 2011 issue of Cancer Research (1), a panel is missing from Figure 2. The missing panel is provided below.

1.
Rhodes
LV
,
Short
SP
,
Neel
NF
,
Salvo
VA
,
Zhu
Y
,
Elliott
S
, et al
Cytokine receptor CXCR4 mediates estrogen-independent tumorigenesis, metastasis, and resistance to endocrine therapy in human breast cancer
.
Cancer Res
2011
;
71
:
603
13
.