«Vitamin A and D deficiencies in the prognosis of respiratory tract infections: A systematic review with perspectives for COVID-19 and a critical analysis on supplementation». Revista Contexto & Saúde 22, no. 46 (noviembre 16, 2022): e11026. Accedido septiembre 10, 2026. https://revistas.unijui.edu.br/contextoesaude/article/view/11026.