1. Center for Healthy Ageing and Wellness, Faculty of Health Sciences, Universiti Kebangsaan Malaysia, Kuala Lumpur, Malaysia;
2. Environmental Health and Industrial Safety Programme, Faculty of Health Sciences, Universiti Kebangsaan Malaysia, Kuala Lumpur, Malaysia;
3. Biocompatibility Laboratory, Centre for Research and Instrumentation, Universiti Kebangsaan Malaysia, Bangi, Selangor, Malaysia