Fig. 1From: Management of hypothyroidism with combination thyroxine (T4) and triiodothyronine (T3) hormone replacement in clinical practice: a review of suggested guidanceMean values for a free T3, b free T4 and c TSH over a 24Â h period in 10 patients with hypothyroidism on either LT4/LT3 combination or LT4 alone. From Saravanan et al. [63], used with permissionBack to article page