Radioactive fallout.
D000367:Age Factors; D002648:Child; D006801:Humans; D009381:Neoplasms, Radiation-Induced / Q000209:etiology*; D011210:Power Plants; D011847:Radioactive Fallout; D013964:Thyroid Neoplasms / Q000209:etiology*; D014481:United States
D011847:Radioactive Fallout