Error in Author Affiliations

In the Original Investigation titled “ATP1A3 Variants, Variably Penetrant Short QT Intervals, and Lethal Ventricular Arrhythmias,” published online March 3, 2025, and in the May 2025 issue of JAMA Pediatrics, the author affiliations of Drs Garone and Vigevano were listed incorrectly. Dr Garone’s affiliation should have been listed as “Neurology, Epilepsy and Movement Disorders Unit, Bambino Gesù Children’s Hospital, IRCCS, Full Member of European Reference Network on Rare and Complex Epilepsies, EpiCARE, Rome, Italy.” Dr Vigevano’s affiliation should have been listed as “Developmental Disabilities Department, IRCCS San Raffaele, Rome, Italy.” This article was corrected online.