1. Adults Clinic, School of Dentistry; University of San Sebastian; Puerto Montt Chile
2. Department of Pediatric Dentistry; University of North Carolina-Chapel Hill; Chapel Hill NC USA
3. Department of Paediatric Dentistry, School of Dentistry; Catholic University of Cordoba; Cordoba Argentina
4. Adults Clinic, School of Dentistry; University of San Sebastian; Concepcion Chile
5. Office of Research and Graduate Studies, Department of Graduate Studies; University of Los Lagos; Santiago Chile
6. Department of Health Behavior, UNC Gillings School of Global Public Health; University of North Carolina-Chapel Hill; Chapel Hill NC USA
7. Department of Community and Preventive Dentistry, School of Dentistry; National and Kapodistrian University of Athens; Athens Greece