In the article “Brain-Specific Knock-Out of Hypoxia-Inducible Factor-1α Reduces Rather Than Increases Hypoxic-Ischemic Damage,” by Rob Helton, Jiankun Cui, John R. Scheel, Julie A. Ellison, Chris Ames, Claire Gibson, Barbara Blouw, Ling Ouyang, Ioannis Dragatsis, Scott Zeitlin, Randall S. Johnson, Stuart A. Lipton, and Carrolee Barlow, which appeared on pages 4099-4107 of the April 20, 2005 issue, the fourth sentence of Materials and Methods is incorrect. The sentence should read as follows: “R1ag#5 mice expressing cre recombinase (CRE) under the control of the α subunit of the calcium/calmodulin-dependent kinase II (CaMKII) promoter (CAMCRE) were provided by Dr. Ioannis Dragatsis (University of Tennessee, Memphis, TN).”