Results from the chip approach in a patient with confirmed history of allergies. Sera from patient number 2 (ISM) with known allergy against birch pollen, hazelnut, and wasp was analyzed by chip-profiling (triplicates). IgE reactivity was quantified by Microarray Image Analyzer v3.1.2 software and expressed by ISU. ISU values are listed in the right panel. ISU score: <0.3 ISU, below cutoff; >0.3 to <1 ISU, low; ≥1 to <10 ISU, moderate to high; >10 ISU, very high. For more details, see Table E3.