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Sponsored Design Multi-Agent AI Systems Using MCP and A2A: Engineer your own Pyt Design Multi-Agent AI Systems Using MCP and A2A: Engineer your own Pyt

Author

C. Nogueira-de-Almeida

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Open access Oct 2026

Validity of a questionnaire to estimate vitamin A intake in pregnant women

The objective was to assess the relative validity of a food frequency questionnaire (FFQ) to estimate daily vitamin A intake in pregnant women using two biomarkers as references, maternal serum retinol and breast milk retinol. This is an observational, descriptive, analytical, cross-sectional study. FFQ was applied to...

M. T. Isobe, I. S. Ferraz, T. M. M. Deminice et al. · 1 citation

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