In the article on MDSC and ATRA in the November 15, 2007 issue of Cancer Research (1), there are labels missing from Fig. 3B. The corrected figure appears below.

1
Nefedova Y, Fishman M, Sherman S, Wang X, Beg AA, Gabrilovich DI. Mechanism of all-trans retinoic acid effect on tumor-associated myeloid-derived suppressor cells.
Cancer Res
2007
;
67
:
11021
–8.