title: Letter: Low pleural fluid pH in parapneumonic effusion.
mesh_terms: D004322:Drainage; D005947:Glucose / Q000032:analysis; D006801:Humans; D006863:Hydrogen-Ion Concentration; D008297:Male; D008875:Middle Aged; D010996:Pleural Effusion / Q000032:analysis* / Q000209:etiology / Q000601:surgery; D011014:Pneumonia / Q000150:complications*; D011677:Punctures
chemical_list: D005947:Glucose