1. Section of Infectious Diseases, Department of Internal Medicine, Yale University School of Medicine, New Haven, Connecticut, USA.
2. Department of History of Science, Harvard University, Cambridge, Massachusetts, USA.
3. Department of Medicine, Faculty of Medicine, Centre of Excellence for Research in AIDS, University of Malaya, Kuala Lumpur, Malaysia.
4. Quinnipiac University School of Medicine, Hamden, Connecticut, USA.
5. Department of Social and Preventive Medicine, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia.