studies on peripheral metabolism of simultaneously administered 125-i-labeled l-thyroxine ( [ 125-i ] t4 ) and 131-i labeled l-trilodothyronine ( [ 131-i ] t3 ) were performed in five normal subjects , in four patients with untreated hypothyroidism , and in 3 hypothyroid patients made euthyroid by the administration of t4 .
C0040165
thyroxine
C0020676
hypothyroid