1. Centre of Population Health, Department of Social and Preventive Medicine, Faculty of Medicine, University of Malaya Kuala Lumpur,Malaysia
2. MedCentral Consulting, Kuala Lumpur,,Malaysia
3. Centre of Population Health, Department of Social and Preventive Medicine, Faculty of Medicine, University of Malaya Kuala Lumpur,Malaysia | Faculty of Public Health, Universitas Airlangga, Surabaya, Indonesia