1 Department of Medicine, Stanford University School of Medicine, Stanford, California.
2 Department of Cardiology, The Texas Heart Institute, Houston, Texas; Center for Cardiac Arrhythmias and Electrophysiology, The Texas Heart Institute, Houston, Texas.
3 Cardiovascular Institute, Stanford University, Stanford, California; Stanford Center for Inherited Cardiovascular Disease, Stanford, California; Division of Cardiovascular Medicine, Department of Medicine, Stanford University School of Medicine, Stanford, California. Electronic address: mvperez@stanford.edu.