title: PO 2 , PCO 2 , and pH in pleural effusion.
mesh_terms: D002245:Carbon Dioxide / Q000032:analysis*; D006801:Humans; D006863:Hydrogen-Ion Concentration; D010100:Oxygen / Q000032:analysis*; D010313:Partial Pressure; D010996:Pleural Effusion / Q000032:analysis*
chemical_list: D002245:Carbon Dioxide; D010100:Oxygen