1. Department of Vascular Surgery, The Permanente Medical Group, South San Francisco, California
2. Division of Research, Kaiser Permanente Northern California, Oakland
3. Department of Surgery, University of California San Francisco - East Bay, Oakland
4. Department of Surgery, University of California San Francisco
5. Department of Vascular Surgery, The Permanente Medical Group, Santa Clara, California
6. Department of Vascular Surgery, The Permanente Medical Group, San Francisco, California
7. Department of Neurology, The Permanente Medical Group, Redwood City, California
8. Department of Medicine, University of California San Francisco
9. Department of Epidemiology and Biostatistics, University of California San Francisco
10. Department of Neurology, The Permanente Medical Group, Walnut Creek, California