1. Paediatric Dentistry Service, Hospital HM Nens, HM Hospitales, 08009 Barcelona, Spain
2. Faculty of Dentistry, Universitat Internacional de Catalunya, 08195 Barcelona, Spain
3. Biomedical Department, Faculty of Health Science, Universidad de Antofagasta, Antofagasta 1270300, Chile
4. Master of Biomedical Science, Universidad de Antofagasta, Antofagasta 1270300, Chile
5. Dentistry Department, Faculty of Medicine and Odontology, Universidad de Antofagasta, Antofagasta 1270300, Chile