in the hair of 41 normal newborn children the amounts of the trace elements zinc , copper , manganese and gold were followed up longitudinally by neutron activation analysis , the samples being taken on the 1st day of life , between the 63th and 109th days , the 200th and 240 th as well as between the 368th and 478th days of life .
C0021289
newborn
C0008059
children