TG and hyperthyroidism: We excluded episodes for which (a) there were less thantwo TFTs available, that is, either only TSH without matching fT4, or TSHand fT4 on only one occasion, or (b) TFTs could not be interpreted due tothe lack of other clinical information, (c) thyroid hormone replacementtherapy (THRT) had resulted in unintended (iatrogenic) hyperthyroidism, (d)hyperthyroidism had been a result of an overdose with thyroid hormones, or(e) hyperthyroidism had been transient as a result of nonthyroid illness.(Panel1).