1. Department of Infectious Diseases; St. Vincent's Hospital; Sydney Australia
2. School of Medical Sciences; University of New South Wales; Australia
3. Division of Serology and Virology; South Eastern Area Laboratory Services, Prince of Wales Hospital; Sydney Australia
4. Department of Haematology; Prince of Wales Hospital; Sydney Australia
5. School of Biotechnology and Biomolecular Sciences; University of New South Wales; Australia
6. Department of Infectious Diseases; Prince of Wales Hospital; Sydney Australia