1. Department of Medicine, Case Western Reserve University School of Medicine, Cleveland, OH (E.Z.G.).
2. Heart, Vascular, and Thoracic Institute Research and Registries, Cleveland Clinic, OH (L.A.M.).
3. Department of Cardiovascular Medicine, Heart, Vascular, and Thoracic Institute, Cleveland Clinic, OH (H.R., J.B.Y., W.H.W.T.).
4. Epilepsy Center, Neurological Institute, Cleveland Clinic, OH (L.J.).