1Hospital Moinhos de Vento, Rua Ramiro Barcelos 910, Porto Alegre, RS 90035-004 Brazil
2Department of Radiology and Oncology, Medical School, Universidade de São Paulo (USP), and Instituto do Câncer do Estado de São Paulo (ICESP), São Paulo, SP Brazil
3Department of Chronic Conditions and Sexually Transmitted Infections, Ministry of Health, Brasília, DF Brazil
4Department of Preventive and Social Dentistry, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS Brazil
5Department of Public Health, Universidade Federal de Ciências da Saúde de Porto Alegre (UFCSPA), Porto Alegre, RS Brazil
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