In the article by Fragoso et al entitled “VEGFR-1 (FLT-1) activation modulates acute lymphoblastic leukemia localization and survival within the bone marrow, determining the onset of extramedullary disease,” which appeared in the February 15, 2006, issue of Blood (Volume 107:1608-1616), Sérgio Dias's e-mail address was incorrect; it should have been sergidias@ipolisboa.min-saude.pt.

This error was corrected online in departure from print.