Thyroxine/Triiodothyronine uptake index:MRto:Pt:Ser/Plas:Qn
thyroxine/triiodothyronine uptake index:mrto:pt:ser/plas:qn
T4/Triiodothyronine (T3) uptake index [Mass ratio]
t4/triiodothyronine (t3) uptake index [mass ratio]