The version of the Editorial Commentary, “Promoting Regulatory Gene Variation in Sodium Reabsorption,” by Doris that was posted online on August 18, 2008 (DOI:10.1161/HYPERTENSIONAHA108.116145), was mistakenly entitled “Characterization and Functional Analyses of the Human G Protein Coupled Receptor Kinase 4 Gene Promoter.” The correct title has been used in the final print version of the article in the October 2008 issue of the journal (Hypertension. 2008:52:623--624) and in the current online version.