1. Post‐graduate program in Epidemiology Federal University of Rio Grande do Sul Porto Alegre Brazil
2. Center for Epidemiological Studies in Health and Nutrition University of São Paulo São Paulo Brazil
3. Department of Oral Health Sciences School of Dentistry Department of Health Services School of Public Health University of Washington Seattle, Washington
4. Department of Oral Sciences University of Otago Dunedin New Zealand
5. Department of Preventive and Social Dentistry Federal University of Rio Grande do Sul Porto Alegre Brazil