on these levels were assessed by using the non parametric Mann–Whitney and Kruskal–Wallis tests. The magnitude of the correlation between metal concentration in urine and hair samples was assessed by the Spearman rank correlation test
on these levels wereassessed by using the non parametric Mann–Whitney and Kruskal–Wallistests. The magnitude of the correlation between metalconcentration in urine and hair samples was assessed by the Spearmanrank correlation test