[1] Hospital Moinhos de Vento,Department of Radiology and Oncology, Medical School
[2] Universidade de São Paulo (USP),Department of Chronic Conditions and Sexually Transmitted Infections
[3] and Instituto do Câncer do Estado de São Paulo (ICESP),Department of Preventive and Social Dentistry
[4] Ministry of Health,Department of Public Health
[5] Universidade Federal do Rio Grande do Sul,undefined
[6] Universidade Federal de Ciências da Saúde de Porto Alegre (UFCSPA),undefined