1. Department of Paediatric Dentistry and Orthodontics, Faculty of Dentistry, University of Malaya, Kuala Lumpur, Malaysia
2. Department of Rehabilitation Medicine, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia
3. Department of Community Oral Health & Clinical Prevention, Faculty of Dentistry, University of Malaya, Kuala Lumpur, Malaysia
4. Permai Psychiatric Institution, Johor Bahru, Malaysia
5. School of Medicine, The University of Queensland, Australia, Woolloongabba, QLD, Australia