Figure 3. Representative dot plot graph of patient 4 showing basophil activation with negative control, positive controls (fMLP and anti-IgE), metamizole and metamizole metabolites: 4-methylamino antipyrine (MAA), 4-aminoantipyrine (AA), 4-acetylamino antipyrine (AAA) and 4-formylamino antipyrine (FAA) at 0.25 mg/mL.

The figure also shows the stimulation index (SI) values for each determination.