Vol. 207, No. 3, March 15, 2010. Pages 491–503.

The authors regret that Hellmut G. Augustin was excluded from the author list in the original manuscript. Drs. Augustin and Schadendorf are co-senior authors of the study. The pdf and html versions of the article have been updated to reflect the correction of this error.

In addition, Dr. Augustin received support for this work from the Austrian Science Fund (FWF S9404-B11).