title: Letter: Nodular densities in lung.
mesh_terms: D003586:Cytomegalovirus Infections / Q000000981:diagnostic imaging; D006801:Humans; D008168:Lung / Q000000981:diagnostic imaging*; D011020:Pneumonia, Pneumocystis / Q000000981:diagnostic imaging*; D011024:Pneumonia, Viral / Q000000981:diagnostic imaging; D011859:Radiography