1. Department of Veterans Affairs, Northern California Health Care System, Martinez, CA 94553 and UC Davis School of Medicine, Davis, CA 95616
2. Chicago VA Health Care System-West Side Division and Department of Psychiatry, University of Illinois-Chicago College of Medicine, Chicago, IL 60612
3. East Bay Institute for Research and Education, Martinez, CA 94553
4. University of Chicago School of Medicine, Chicago, IL 60637
5. Department of Veterans Affairs, Northern California Health Care System, Martinez, CA 94553
6. BioRad, Hercules, CA 94547