hypothyroidism , induced from the day of birth by daily treatment with propylthiouracil ( ptu-rats ) , leads to dramatic and sustained increases of the th-binding abilities of the sera measured at equilibrium , whereas hyperthyroidism , induced by treatment with thyroxine ( t4-rats ) , leads to the decrease of these abilities .
C0020676
hypothyroidism
C0040165
thyroxine