Author Contributions:Study concept and design: Al-Khatib, Kutner, Masoudi, and Matlock. Acquisition of data: Matlock. Analysis and interpretation of data: Caverly, Al-Khatib, Kutner, and Matlock. Drafting of the manuscript: Caverly and Matlock. Critical revision of the manuscript for important intellectual content: Caverly, Al-Khatib, Kutner, Masoudi, and Matlock. Statistical analysis: Caverly. Obtained funding: Matlock. Study supervision: Kutner. Electrophysiology expertise: Al-Khatib.