For the article by John P. Bannister, Adebowale Adebiyi, Guiling Zhao, Damodaran Narayanan, Candice M. Thomas, Jessie Y. Feng, and Jonathan H. Jaggar (Smooth muscle cell α2δ-1 subunits are essential for vasoregulation by CaV1.2 channels. Circ Res. 2009;105:948–955; DOI: 10.1161/CIRCRESAHA.109.203620), the authors wish to retract Online Supplemental Figure 1 because an error was made in the compilation of this figure. Removal of this figure from the Online Supplement does not alter the article’s conclusions or findings. The authors sincerely apologize for this error.
This correction has been made to the current online version of the article, which is available at http://circres.ahajournals.org/content/105/10/948.