1. Department of Medical Microbiology, Faculty of MedicineUniversity of Malaya, 50603 Kuala Lumpur, Malaysia
2. Department of Medicine, Faculty of MedicineUniversity of Malaya, 50603 Kuala Lumpur, Malaysia
3. AIDS Research CenterNational Institute of Infectious Diseases, 162-8640 Tokyo, Japan
4. Faculty of Information Science & TechnologyMultimedia University, 75450 Melaka, Malaysia
5. Division of Genetics and Molecular Biology, Institute of Biological Sciences, Faculty of ScienceUniversity of Malaya, 50603 Kuala Lumpur, Malaysia