Barr, L. C. et al (2014) Reply: The alveolar macrophage and acute respiratory distress syndrome: a silent actor? Am J Respir Crit Care Med. 189(4):500-1 Reply: The alveolar macrophage and acute respiratory distress syndrome: a silent actor? Barr, L.C., Brittan. M., Morris, A. C., McAuley, D. F., McCormack, C., Fletcher,…