Ved lignende eksposition hos rotter sås en øget forekomst af thyroide adenomer, sandsynligvis relateret til en stigning i frigørelsen af thyroideastimulerende hormon sekundært til en stigning i thyroxinclearance.
In rats, at similar exposure levels, an increased incidence of thyroid adenomas was seen, probably related to an increase in release of thyroid stimulating hormone secondary to an increase in thyroxine clearance.