Fig. 1From: A methodological consideration for blood lead concentrations obtained from the earlobe in Japanese adults occupationally unexposed to leadRelationship between blood lead (BPb) concentrations measured in samples obtained from the earlobe and the median cubital vein from 112 subjects: r S indicates the Spearman rank correlation coefficient. The linear regression equation is as follows: [cubital vein BPb] = 0.959 × [earlobe BPb] + 0.005Back to article page