1. Department of Medicine, University of California, San Francisco
2. Department of Epidemiology and Biostatistics, University of California, San Francisco
3. Section of Cardiac Electrophysiology, Division of Cardiology, Department of Medicine, University of California, San Francisco
4. Department of Medicine, Kaiser Permanente, San Francisco, California
5. Department of Pathology, University of California, San Francisco
6. Office of Chief Medical Examiner, City and County of San Francisco, San Francisco, California