1. Melbourne Dental School, The University of Melbourne, Parkville, VIC 3010, Australia
2. Center for Research in Epidemiology, Economics and Oral Public Health (CIEESPO), Faculty of Dentistry, Universidad de La Frontera, Temuco 4811230, Chile
3. Department of Rural Health, Department of Rural Health, The University of Melbourne, Shepparton, VIC 3630, Australia
4. Macarthur Clinical School, Western Sydney University, Sydney, NSW 2060, Australia