1. Department of Psychological Medicine Faculty of Medicine, University Malaya, Kuala Lumpur, Malaysia;
2. Department of Psychological Medicine, University Malaya Centre of Addiction Science (UMCAS), Faculty of Medicine, University Malaya, Kuala Lumpur, Malaysia;
3. Department of Psychiatry and Mental Health, Hospital Tuanku Ja’afar, Seremban (HTJS), Malaysia