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. 2022 Jul 4;40(11):1121–1137. doi: 10.1007/s11604-022-01306-w

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Fig. 2 — Diagnostic flow for FUO modified from Harrison’s principles of internal medicine. ESR erythrocyte sedimentation rate, CRP C-reactive protein, Hb hemoglobin, AST alanine aminotransferase, ALT aspartate aminotransferase, LDH lactate dehydrogenase, AUS abdominal ultrasonography, IGRA r interferon γ release assay, PDC potential diagnostic clues, NSAID Non-Steroidal Anti-Inflammatory Drugs