1. Department of Biomedical Science, Faculty of Medicine University of Malaya Kuala Lumpur Malaysia
2. Department of Pathology, Faculty of Medicine University of Malaya Kuala Lumpur Malaysia
3. Department of Social and Preventive Medicine, Faculty of Medicine University of Malaya Kuala Lumpur Malaysia
4. Faculty of Medicine University Kuala Lumpur Royal College of Medicine Perak Ipoh Malaysia
5. Department of Pathology Selayang Hospital Selayang Malaysia