Figure 1

Paired boxplot of serum levels of various allergens: comparison between sige before and after storage, across different storage times and positivity levels. d1: House dust mite; e5: Dog hair; m3: Mold; i6: Cockroach; f2: Milk; G3: samples stored for 3 years; G5: samples stored for 5 years; G10: samples stored for 10 years; High level: samples of level 0–2; Medium level: level 3–4; Low level: level 5–6.