1. UCL Eastman Dental Institute; Unit of Paediatric Dentistry, Department of Craniofacial Growth and Development; 256 Gray's Inn Road London UK WC1X 8LD
2. The University of Manchester; PhD student at School of Medical Sciences, Division of Dentistry; Manchester UK
3. College of Dentistry, Majmaah University; Department of Preventive Dentistry; Al Majma'ah Saudi Arabia