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AUCs produced by receiver operating characteristics to predict PPE from MPE or TPE
AUC: area under curve; PPE: parapneumonic pleural effusion; MPE: malignant pleural effusion; TPE: tuberculous pleural effusion; LR+: likelihood ratio positive; LR-: likelihood ratio negative; PTX3: pentraxin-3; CRP: C-reactive protein; PCT: procalcitonin.
