There were errors in Fig. 6, B and D, and in Fig. 5F. In Fig. 6, B and D, the y-axes were labeled incorrectly as μM when they should be nM. In Fig. 5F, incorrect photomicrographs of the tissues are shown. All figures were correct at the time of original manuscript submission and review. The errors were introduced through the process of reformatting from PowerPoint to Photoshop. The corrected online version of the article is at http://stm.sciencemag.org/content/4/140/140ra86.full, and the corrected PDF version of the article is at http://stm.sciencemag.org/content/4/140/140ra86.full.pdf.
- Copyright © 2012, American Association for the Advancement of Science
