1. Melbourne Dental School, University of Melbourne, Melbourne 3010, Australia
2. Dental School, Faculty of Dentistry, Universidad de La Frontera, Temuco 4781176, Chile
3. Programa de Magister en Odontología, Facultad de Odontología, Universidad de La Frontera, Temuco 4811230, Chile
4. Department of Pediatric Dentistry and Orthodontics, Faculty of Dentistry, Universidad de La Frontera, Temuco 4781176, Chile
5. Center for Research in Epidemiology, Economics and Oral Public Health (CIEESPO), Faculty of Dentistry, Universidad de La Frontera, Temuco 4811230, Chile