In this article (Cancer Res 2009;69:6865–70), which was published in the September 1, 2009 issue of Cancer Research (1), the contributions of Ms. Michelle M. Zuanich should have been acknowledged.

1
Li
CI
,
Daling
JR
,
Porter
PL
,
Tang
M-TC
,
Malone
KE
. 
Adjuvant hormonal therapy for breast cancer and risk of hormone receptor-specific subtypes of contralateral breast cancer
.
Cancer Res
2009
;
69
:
6865
70
.