1. Department of Social and Preventive Medicine, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia
2. UM Cancer Research Institute and Department of Surgery, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia
3. Department of Surgery, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia
4. Centre for Population Health and Department of Social and Preventive Medicine, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia
5. Department of Nutrition, Faculty of Public Health, University of Airlangga, Surabaya, Indonesia