1. Hepatitis B Foundation and Baruch S. Blumberg Institute, Doylestown, Pennsylvania;
2. Victorian Infectious Diseases Reference Laboratory, Doherty Institute, Melbourne, Australia;
3. Alaska Native Health Center, Anchorage;
4. Immunology Section, Liver Diseases Branch, National Institutes of Health, Bethesda, Maryland; and
5. Department of Medicine, University of California, San Francisco