1. Immunology Section, San Francisco VA Medical Center, San Francisco, California.
2. Department of Medicine, University of California, San Francisco, San Francisco, California.
3. Department of Neurological Surgery, San Francisco VA Medical Center, San Francisco, California.
4. Department of Neurological Surgery, University of California, San Francisco, San Francisco, California.
5. Pathology Service, San Francisco VA Medical Center, San Francisco, California.
6. Department of Pathology, University of California, San Francisco, San Francisco, California.
7. Liver Center, San Francisco VA Medical Center, San Francisco, California.
8. Gladstone Institute of Cardiovascular Disease, San Francisco, California.