title: Blood- and air-lead concentrations during five years of occupational exposure: the effectiveness of an occupational hygiene programme and problems due to welding operations.
mesh_terms: D000388:Air / Q000032:analysis*; D000395:Air Pollutants, Occupational / Q000032:analysis*; D004781:Environmental Exposure; D006801:Humans; D007854:Lead / Q000032:analysis* / Q000097:blood; D013997:Time Factors; D014896:Welding
chemical_list: D000395:Air Pollutants, Occupational; D007854:Lead