The thyroid function tests such as thyroid stimulating hormone (TSH), free tri-iodothyronine (FT3), free thyroxine (FT4) and parathyroid hormone test (PHT) were used as parameter for the diagnosis of endocrine disorders in the studies [26, 27, 29], however, only the study by Yassouf et al. (2019) [26] evaluated the readings of TSH and FT4 among the groups and concluded non-compliance with DFO therapy raised the risk of thyroid dysfunction by 6.38 times. The gene discussed is PTH; the disease is thyroiditis.