Error in Byline. In the byline for the Original Investigation titled “Comparative Effectiveness of Rhythm Control vs Rate Control Drug Treatment Effect on Mortality in Patients With Atrial Fibrillation” by Ionescu-Ittu et al published online June 4, 2012, and in the July 9, 2012, print issue of the Archives (2012;172[13]:997-1004), Dr Eisenberg should have been listed as Mark J. Eisenberg, MD, MPH.