title: Evaluating pleural effusions. A two-stage laboratory approach.
mesh_terms: D001798:Blood Proteins / Q000032:analysis; D003937:Diagnosis, Differential; D005122:Exudates and Transudates / Q000032:analysis; D005189:False Positive Reactions; D005260:Female; D006333:Heart Failure / Q000175:diagnosis; D006801:Humans; D007770:L-Lactate Dehydrogenase / Q000097:blood; D008722:Methods; D010996:Pleural Effusion / Q000201:enzymology / Q000378:metabolism*; D011014:Pneumonia / Q000175:diagnosis; D012189:Retrospective Studies
chemical_list: D001798:Blood Proteins; D007770:L-Lactate Dehydrogenase