1. The Macfarlane Burnet Institute for Medical Research and Public Health, Melbourne, Victoria, Australia, 3004.
2. Department of Medicine, Monash University, Clayton, Victoria, Australia, 3800.
3. The Papua New Guinea Institute for Medical Research, Goroka, PNG.
4. The National Reference Laboratory, Melbourne, Victoria, Australia, 3000.
5. Global HIV/AIDS Program, The World Bank, Washington, D.C.