1. Department of Paediatric Dentistry, School of Dentistry International University of Catalunya Barcelona Spain
2. Department of Epidemiology & Public Health Institute of Epidemiology & Health, University College London London UK
3. Department of Child & Public Dental Health Dublin Dental University Hospital, Trinity College Dublin Dublin Ireland
4. Department of Paediatric Dentistry, School of Dentistry Federal University of Minas Gerais Belo Horizonte Brazil
5. Postgraduate Program in Dental Sciences Federal University of Santa Maria Santa Maria Brazil
6. Department of Pediatric Dentistry, School of Dentistry University of São Paulo São Paulo Brazil