1. Department of Paediatric Dentistry; Dental School; Aristotle University of Thessaloniki; Thessaloniki Greece
2. Paediatric Dentist works in a private practice; Thessaloniki Greece
3. Department of Oral Health Sciences; School of Dentistry; University of Washington; Seattle WA
4. Department of Educational & Social Policy; School of Social Sciences, Humanities and Arts; University of Macedonia; Thessaloniki Greece