Triiodothyronine/Thyroxine:MRto:Pt:Ser/Plas:Qn
triiodothyronine/thyroxine:mrto:pt:ser/plas:qn
Triiodothyronine (T3)/Thyroxine (T4) [Mass Ratio] in Serum or Plasma
triiodothyronine (t3)/thyroxine (t4) [mass ratio] in serum or plasma