1. Department of Community Medicine & Public Health, Faculty of Medicine & Health Sciences, Universiti Malaysia Sarawak, Kota Samarahan, Sarawak, Malaysia
2. Department of Nursing, Faculty of Medicine & Health Sciences, Universiti Malaysia Sarawak, Kota Samarahan, Sarawak, Malaysia
3. School of Health Sciences, Universiti Sains Malaysia, Kubang Kerian, Kelantan, Malaysia