1. School of Pharmaceutical Sciences, Universiti Sains Malaysia, 11800 USM, Penang, Malaysia
2. Pusat Racun Negara, Universiti Sains Malaysia, 11800 USM, Penang, Malaysia
3. Clinical Research Centre, Seberang Jaya Hospital, Ministry of Health, Penang, Malaysia
4. Clinical Research Centre, Hospital Sultanah Nur Zahirah, Ministry of Health, Terengganu, Malaysia
5. Department of Biological Science, Faculty of Science, Universiti Tunku Abdul Rahman, Bandar Barat, 31900 Kampar, Perak, Malaysia
6. National Institutes of Health (NIH), Ministry of Health, Malaysia, Kuala Lumpur, Malaysia