In the article by McCord and colleagues on physiologic oxygen and GB stem cells in the April 2009 issue of Molecular Cancer Research, an author’s name was spelled incorrectly. The correct spelling of the name is Uma T. Shankavaram.

McCord AM, Jamal M, Shankavaram UT, Lang FF, Camphausen K, Tofilon PJ. Physiologic oxygen concentration enhances the stem-like properties of CD133+ human glioblastoma cells in vitro. Mol Cancer Res 2009;7:489–97.