Letter by Jalife et al Regarding Article, "Quantitative Analysis of Localized Sources Identified by Focal Impulse and Rotor Modulation Mapping in Atrial Fibrillation"
1 Center for Arrhythmia Research, Departments of Internal Medicine and Molecular and Integrative Physiology, University of Michigan, Ann Arbor, MI, Centro Nacional de Investigaciones Cardiovasculares (CNIC), Madrid, Spain.
2 Myocardial Pathophysiology Area, Centro Nacional de Investigaciones Cardiovasculares (CNIC), Madrid, Spain.
3 Center for Arrhythmia Research, Departments of Internal Medicine and Biomedical Engineering University of Michigan, Ann Arbor, MI.