Affiliation: | 1. Graduate Program in Collective Health, Federal University of Rio Grande do Norte, Natal, Rio Grande do Norte, Brazil;2. Microbiology, Preventive Medicine and Public Health Department, University of Zaragoza, Zaragoza, Spain;3. Odontology Department, Federal University Rio Grande do Norte, Natal, Rio Grande do Norte, Brazil;4. Collective Health Department, Federal University of Rio Grande do Norte, Natal, Rio Grande do Norte, Brazil |