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F.E. Silvera, M.F. Blasina, L. Vaamonde, S. Tellechea, C. Godoy, S. Zabala, G. Mañana, M. Martell, W. Olivera. "Sildenafil prevents the increase of extravascular lung water and pulmonary hypertension after meconium aspiration in newborn piglets." Brazilian Journal of Medical and Biological Research 44.8 (2011) 778-785