1. Department of Environmental Health, Faculty of Health Sciences, Universiti Selangor, Shah Alam Campus, Selangor, Malaysia
2. Provenue Corporation Sdn Bhd, Subang Jaya, Malaysia
3. Center for Toxicology and Health Risk Studies (CORE), Faculty of Health Sciences, Universiti Kebangsaan Malaysia, Kuala Lumpur Campus, Malaysia
4. Engineering Services Division, Ministry of Health Malaysia, Putrajaya, Malaysia