In this article (Cancer Res 2011;71:4977–88), which was published in the July 15, 2011 issue of Cancer Research (1), the concentration between 1% dimethyl sulfoxide (DMSO) and 1 μmol in Fig. 3A–E should be 100 nmol/L. The amended figure is included below. The publisher regrets this error.

1.
Dufour
A
,
Sampson
NS
,
Li
J
,
Kuscu
C
,
Rizzo
RC
,
DeLeon
JL
, et al
Small-molecule anticancer compounds selectively target the hemopexin domain of matrix metalloproteinase-9
.
Cancer Res
2011
;
71
:
4977
88
.