1. Centre of Paediatric Dentistry and Orthodontics Studies, Faculty of Dentistry, Universiti Teknologi MARA Campus Sungai Buloh, Sungai Buloh, Selangor, Malaysia
2. Faculty of Dentistry, Universiti Teknologi MARA Campus Sungai Buloh, Selangor, Malaysia
3. Department of Oral Science, Faculty of Dentistry, University of Otago, Dunedin, New Zealand