1. Institute for Public Health, National Institutes of Health, Ministry of Health Malaysia Selangor Malaysia
2. Sector for Biostatistics & Data Repository, National Institutes of Health, Ministry of Health Malaysia, Research Policy and Planning Division Selangor Malaysia
3. Family Health Development Division Ministry of Health Malaysia Putrajaya Malaysia
4. Center for Epidemiology and Evidence Based Practice, Department of Social and Preventive Medicine, Faculty of Medicine University of Malaya Kuala Lumpur Malaysia