When assessed in combination with eosinophilia (i.e. > 400 cells/μl) and absolute WBC count, a panel comprising eosinophilia, IL-9 and CCL3 was highlighted as having 87.6% AUC (85.3% SP–87.5% SE), as soon as two out of the three variables are above (or below) their respective cut-offs. This evidence concerns the gene IL9 and Increased total eosinophil count.