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[\'DMAE - Municipal Water and Sewerage Department, Porto Alegre, RS, Brazil.\', \'University of Feevale, Novo Hamburgo, RS, Brazil.\', \'University of Texas - Houston School of Public Health, Houston, United States.\', \'UFPR - Federal University of ParanĂ¡, Curitiba, PR, Brazil. Electronic address: ramiro.etchepare@ufpr.br.\']
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