Researcher them at Sweden 's Karolinska Institute reanalyzed datum them from more than 2,000 infant them who had been treated with radiation for a benign birthmark condition between 1930 and 1959 .
Researcher them at Sweden 's Karolinska Institute recently went over datum them from more than 2,000 child them treated with radiation for a harmless birthmark condition between 1930 and 1959 .