In the article on proliferation of tumor vessels in prostate cancer in the June 1, 2009 issue of Cancer Research (1), the text at the bottom of Fig. 4 should read “Weeks after castration resistance”.

1
Gravdal K, Halvorsen OJ, Haukaas SA, Akslen LA. Proliferation of immature tumor vessels is a novel marker of clinical progression in prostate cancer.
Cancer Res
2009
;
69
:
4708
–15.