Changes of lead levels in 24-h urine from 1985 to 1998 in Japanese adults.


To determine whether current environmental lead (Pb) levels are causing any progressive changes in urinary Pb levels, 24-h urine samples were collected from 277 subjects (159 men and 118 women) in 1985, 312 subjects (155 men and 157 women) in 1993, and 311 subjects (156 men and 155 women) in 1998. All of the subjects worked in the same factory. The urinary… (More)


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