on the basis of assay of heavy metals in whole blood ( lead , cadimum , chromium , copper , nickel and manganese ) and delta-amino-levulinic-acid dehydrase ( ala-d ) and ala in urine in a normal danish population , the levels of these clinco-chemical factors were assayed in 23 patients with peripheral neuropathy of unknown etiology .
C0347988
heavy metals
C0009968
copper