You have been asked to interpret the results of the following thyroid function test for a 36-year-old female: Blood result Value Normal value TSH 0.10mU/L 0.4-4.0mU/L Free T4 17pmol/L 9.0-25.0pmol/L Free T3 5.9pmol/L 3.5-7.8pmol/L What is the most likely diagnosis?