CRP and Decreased total leukocyte count: Laboratory tests revealed hemoglobin 81 g/L, leukopenia (WBC 2.0 × 109/L), thrombocytopenia (platelets 133 × 109/L), reticulocyte 2.21%, elevated C-reactive protein (CRP 14.3 mg/L), erythrocyte sedimentation rate (ESR) increased to 74 mm/h, and a negative Coombs test.