Thyroid hormone replacement.
D000368:Aged; D006728:Hormones / Q000008:administration & dosage; D006801:Humans; D007037:Hypothyroidism / Q000188:drug therapy*; D008875:Middle Aged; D008991:Monitoring, Physiologic; D013974:Thyroxine / Q000008:administration & dosage*
D006728:Hormones; D013974:Thyroxine