The patient’s WBC count was 11,200/μL with normal differential (1% eosinophilia); hemoglobin level was 9.7 g/dL and platelet count, 233,000/μL. Electrolyte levels and renal and liver function test results were normal. Serology for antinuclear antibodies and antineutrophil cytoplasmic antibodies was normal. Urinalysis was bland. C-reactive protein levels were 168 mg/L on admission (normal, 0-5 mg/L), 70.9 mg/L on day 3, and 23 mg/L on day 8.