1. Faculty of Health and Life Sciences, University of the West of England, Bristol, England
2. School of Clinical Science, University of Bristol, Bristol, England
3. Department of Social and Preventive Medicine, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia
4. National Clinical Research Centre, Kuala Lumpur Hospital, Kuala Lumpur, Malaysia
5. Pathology, University of Malaya Medical Centre, Kuala Lumpur, Malaysia
6. Departments of Surgery, University of Malaya Medical Centre, Kuala Lumpur, Malaysia
7. Cancer Research Initiatives Foundation, Sime Darby Medical Centre, Subang Jaya, Malaysia.