1. Immunovirology and Pathogenesis Program, The Kirby Institute, Randwick, New South Wales, Australia.
2. Department of Immunology, HIV Reference Laboratory, St Vincent's Hospital, Sydney, New South Wales, Australia.
3. Royal Prince Alfred Hospital, Camperdown, New South Wales, Australia.
4. Pathology West, Institute for Clinical Pathology and Medical Research, Sydney, New South Wales, Australia.
5. Virology Research Program, St Vincent's Centre for Applied Medical Research, Sydney, New South Wales, Australia.