@article{vitral_ospina_artimos_melgaço_cruz_paula_luz_freire_gaspar_amado_et al._2012,  title={Declining prevalence of hepatitis A virus antibodies among children from low socioeconomic groups reinforces the need for the implementation of hepatitis A vaccination in Brazil},  volume={107},  ISSN={0074-0276},  url={https://doi.org/10.1590/S0074-02762012000500012},  DOI={10.1590/S0074-02762012000500012},  number={5},  journal={Memórias do Instituto Oswaldo Cruz},  publisher={Instituto Oswaldo Cruz, Ministério da Saúde},  author={Vitral, Claudia Lamarca and Ospina, Fidel Leonardo Navarro and Artimos, Solange and Melgaço, Juliana Gil and Cruz, Oswaldo Gonçalves and Paula, Vanessa Salete de and Luz, Sérgio Bessa and Freire, Marcos and Gaspar, Luciane Pinto and Amado, Luciane Almeida and Engstrom, Elyne Montenegro and Fortes, Camila Dufrayer Fanzeres Monteiro and Souza, Tayla Coleta de and Dias, Marisa Nishitani and Gaspar, Ana Maria Coimbra and Souto, Francisco José Dutra},  year={2012},  month={Aug},  pages={652–658} }