Metanephrine.free/Creatinine:SRto:Pt:Ser/Plas:Qn
metanephrine.free/creatinine:srto:pt:ser/plas:qn
Metanephrine Free/Creatinine [Molar ratio] in Serum or Plasma
metanephrine free/creatinine [molar ratio] in serum or plasma