Validity of a 2-item screen to identify families at risk for food insecurity in Brazil. SciELO Preprints, 2021. DOI: 10.1590/SciELOPreprints.2156. Disponível em: https://preprints.scielo.org/index.php/scielo/preprint/view/2156. Acesso em: 21 jan. 2026.