1. Department of Collective Health Federal University of Pernambuco Recife Brazil
2. Graduate Program in Dentistry Federal University of Paraiba Joao Pessoa Brazil
3. Department of Social Medicine Federal University of Pernambuco Recife Brazil
4. Faculty of Medical Sciences University of Pernambuco Recife Brazil
5. Department of Dentistry University of Brasilia Brasilia Brazil
6. Federal University of Pernambuco Recife Brazil
7. Department of Clinical and Social Dentistry Federal University of Paraíba Joao Pessoa Brazil