1. School of Industrial Technology, Universiti Sains Malaysia, Penang, Malaysia
2. Analytical Biochemistry Research Centre, Universiti Sains Malaysia, Penang, Malaysia
3. School of Biological Sciences, Universiti Sains Malaysia, Penang, Malaysia
4. School of Medical Sciences, Universiti Sains Malaysia, Kubang Kerian, Kelantan, Malaysia
5. Food and Environmental Protection Laboratory, Joint FAO/IAEA Division of Nuclear Techniques in Food and Agriculture, Department of Nuclear Sciences and Applications, International Atomic Energy Agency, Vienna International Centre, Vienna, Austria