1. Department of Infectious Diseases, Monash Medical Centre, Melbourne, VIC.
2. Department of Epidemiology and Preventive Medicine, Monash University, Melbourne, VIC.
3. Infectious Diseases Unit, Alfred Hospital, Melbourne, VIC.
4. Victorian Infectious Diseases Service, Royal Melbourne Hospital, Melbourne, VIC.
5. Department of Medicine, University of Melbourne, Melbourne, VIC.
6. Department of Microbiology, John Hunter Hospital, Newcastle, NSW.
7. University of Newcastle, Newcastle, NSW.