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. 2020 Nov 3;128(11):117001. doi: 10.1289/EHP7201

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Figure 1 is heatmap of a Pearson correlation coefficient matrix, plotting arsenic, cadmium, cobalt, mercury, nickel, and lead (rows) across cadmium, cobalt, mercury, nickel, lead, and thallium (columns). The key for this heatmap is on the right, with values ranging from negative 1 to 1 in increments of 0.2. — Pearson correlations between $\log_{2} -transformed$ urinary metals ( $n = 262$ ). Stronger correlations are indicated by darker shades and larger circles. *, $p < 0.05$ . See Table S7 for corresponding numeric data. Note: As, arsenic; Cd, cadmium; Co, cobalt; Hg, mercury; Ni, nickel; Pb, lead; Tl, thallium.