1. Division of Cardiac Electrophysiology, Department of Cardiology, Houston Methodist DeBakey Heart & Vascular Center, Houston Methodist Hospital (L.T., B.K., S.H.I.-C., J.C., S.W., M.V.), Houston Methodist Research Institute, TX.
2. Cardiology Department, Hospital Universitario Santiago de Compostela, Spain (M.R.-M.).
3. Cardiology Department, Hospital Universitario Santiago de Compostela, Instituto de Investigación Sanitaria de Santiago de Compostela (IDIS), Santiago de Compostela, Spain (M.R.-M.).
4. Centro de Investigación Biomédica en Red de Enfermedades Cardiovasculares (CIBERCV CB16/11/00226-CB16/11/00420), Madrid, Spain (M.R.-M.).
5. Department of Pathology, Comparative Medicine Program (J.M.), Houston Methodist Research Institute, TX.
6. Department of Pathology, Houston Methodist Hospital (R.B.), Houston Methodist Research Institute, TX.