The patient in case 2 had fever for 10 days; only 2 principal clinical features (rash and cervical lymphadenopathy); but 5 laboratory findings (significantly elevated WBC count, anemia, platelet count of >450,000 after the 2 weeks of fever, albumin <3.0 g/dL, and an elevated ALT level). Here, GPT is linked to anemia (phenotype).