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Rousseau et al. (1), in their case-control study of exposure to lead compounds and 11 cancers, reported a positive association between organic lead and stomach cancer. They found little evidence of an association between inorganic lead or lead in gasoline and any of the 11 cancers. These results are in contrast both with the International Agency for Research on Cancer (IARC) classification of organic lead compounds as group 3, ‘‘not classifiable as to carcinogenicity to humans’’ based on inadequate evidence in both humans and experimental animals, and with the IARC classification of inorganic lead compounds as group 2A, ‘‘probably carcinogenic to humans’’ (2).

RE: "OCCUPATIONAL EXPOSURE TO LEAD COMPOUNDS AND RISK OF CANCER AMONG MEN: A POPULATION-BASED CASE-CONTROL STUDY" 1681012181218