All the keywords in this study were classified into 11 clusters (Figure 8): #0 “sensitization,” #1 “intranasal corticosteroids,” #2 “eczema,” #3 “IgE,” #4 “airway inflammation,” #5 “allergy immunotherapy,” #6 “hyperactivity,” #7 “IL-10,” #8 “pump spray,” #9 “clinical benefit,” and #10 “immunotherapy.” According to Figure 8, keyword clusters such as “sensitization,” “airway inflammation,” “allergy immunotherapy,” and “hyperactivity” appeared in 2002, and persisted for 20 years. This evidence concerns the gene IGHE and Allergy.