Barton JC, Leiendecker-Foster C, Reboussin DM, Adams PC, Acton RT, Eckfeldt JH. Thyroid-stimulating hormone and free thyroxine levels in persons with HFE C282Y homozygosity, a common hemochromatosis genotype: the HEIRS study. Thyroid. 2008 Aug; 18(8):831-8.