[1]
Andrade, M.I.S. de, MacĂȘdo, P.F.C. de, Oliveira, T.L.P.S. de ., Lima, N.M. da S. , Ribeiro, I. da C. and Santos, T.M. 2020. 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. SciELO Preprints.