Additional control mice expressing Sln-Cre alone (Sln-Cre Prkaa1+/+ Prkaa2+/+) showed no abnormalities on ECG or evidence of atrial fibrillation (Supplemental Figure 1; supplemental material available online with this article; https://doi.org/10.1172/jci.insight.141213DS1). The gene discussed is SLN; the disease is atrial fibrillation.