Triiodothyronine/Thyroxine:MRto:Pt:Ser/Plas:Qn
triiodothyronine/thyroxine:mrto:pt:ser/plas:qn
Triiodothyronine/Thyroxine:Mass Ratio:To identify measures at a point in time:Serum/Plasma:Quantitative
triiodothyronine/thyroxine:mass ratio:to identify measures at a point in time:serum/plasma:quantitative