1. * Department of Family Oral Health, Faculty of Dentistry, The National University of Malaysia (UKM) , Kuala Lumpur , Malaysia
2. † Department of Paediatric Dentistry and Orthodontics, Faculty of Dentistry, University of Malaya (UM) , Kuala Lumpur , Malaysia
3. ‡ Centre for Paediatric Dentistry and Orthodontic Studies, Faculty of Dentistry, Universiti Teknologi MARA (UiTM) , Selangor , Malaysia
4. § Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, The National University of Malaysia (UKM) , Kuala Lumpur , Malaysia