1. Infectious Diseases Laboratories
2. School of Molecular and Biomedical Science, University of Adelaide, Adelaide 5005, South Australia
3. Division of Tissue Pathology, Institute of Medical and Veterinary Science, Adelaide 5000, South Australia
4. Department of Virology and Immunology, Southwest Foundation for Biomedical Research, Southwest National Primate Research Centre, San Antonio, Texas 78227
5. Alfred Hospital, Melbourne 3000, Australia
6. Department of Gastroenterology and Hepatology, Royal Adelaide Hospital, Adelaide 5000, South Australia