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. 2021 Nov 12;18(22):11846. doi: 10.3390/ijerph182211846

Figure 1.

Figure 1

Box plots for BPA levels in urine samples of Italian children stratified by macro-area and area and normalized to urine creatinine content (µg/g). Outliers above 150 µg/g were excluded from the graph to improve box plot visibility. Asterisks indicate the level of significance: * p < 0.05, ** p < 0.01, *** p < 0.001.