The charcoal T3 ratio. An in vitro test of thyroid function.
D002606:Charcoal; D006801:Humans; D007457:Iodine Radioisotopes; D013960:Thyroid Function Tests; D014284:Triiodothyronine
D007457:Iodine Radioisotopes; D014284:Triiodothyronine; D002606:Charcoal