1. Centre for Occupational and Environmental Health, Department of Social and Preventive MedicineUniversity of MalayaMalaysia
2. Department of HygieneSchool of Medicine, Wakayama Medical UniversityJapan
3. Department of Community Medicine and Public Health, Faculty of Medicine and Health SciencesUniversiti Malaysia SarawakMalaysia
4. School of Health and Nursing Science, Wakayama Medical UniversityJapan
5. Julius Centre University of Malaya, Department of Social and Preventive Medicine, Faculty of MedicineUniversity of MalayaMalaysia
6. Faculty of Applied SociologyKinki UniversityJapan