Effects of prolonged thyroxine treatment on the thyroid-pituitary axis.
D000818:Animals; D008297:Male; D010902:Pituitary Gland / Q000187:drug effects*; D051381:Rats; D013961:Thyroid Gland / Q000187:drug effects*; D013974:Thyroxine / Q000494:pharmacology*
D013974:Thyroxine