1. Department of Family Medicine, School of Medical Sciences, Universiti Sains Malaysia, Kubang Kerian, Kelantan, Malaysia
2. School of Dental Sciences, Universiti Sains Malaysia, Kubang Kerian, Kelantan, Malaysia;
3. Department of Pharmacology, School of Medical Sciences, Universiti Sains Malaysia, Kubang Kerian, Kelantan, Malaysia