Editing Hashimoto's thyroiditis (section)

=== Anti-thyroid antibodies ===
[[Antithyroid autoantibodies|Thyroid peroxidase antibodies]] typically (but not always) decline in patients treated with levothyroxine,<ref name=":0" /> with decreases varying between 10% and 90% after a follow-up of 6 to 24 months.<ref name="Schmidt-2008">{{cite journal | vauthors = Schmidt M, Voell M, Rahlff I, Dietlein M, Kobe C, Faust M, Schicha H | title = Long-term follow-up of antithyroid peroxidase antibodies in patients with chronic autoimmune thyroiditis (Hashimoto's thyroiditis) treated with levothyroxine | journal = Thyroid | volume = 18 | issue = 7 | pages = 755–760 | date = July 2008 | pmid = 18631004 | doi = 10.1089/thy.2008.0008 }}</ref> <!-- This study is being cited as a secondary source for its discussion of other studies. -->One study of patients treated with levothyroxine observed that 35 out of 38 patients (92%) had declines in thyroid peroxidase antibody levels over five years, lowering by 70% on average. 6 of the 38 patients (16%) had thyroid peroxidase antibody levels return to normal.<ref name="Schmidt-2008" />