1. Section of Electrophysiology, Division of Cardiology, Johns Hopkins Hospital, Baltimore, MD (K.N.A.).
2. Department of Biomedical Engineering (K.N.A., N.A.T.), Johns Hopkins University, Baltimore, MD.
3. Biomedical Engineering, Alliance for Cardiovascular Diagnostic and Treatment Innovation (K.N.A., N.A.T.), Johns Hopkins University, Baltimore, MD.