Creatinine^1D post XXX challenge:SCnc:Pt:Ser/Plas:Qn
creatinine^1d post xxx challenge:scnc:pt:ser/plas:qn
Creatinine [Moles/volume] in Serum or Plasma --1 day post XXX challenge
creatinine [moles/volume] in serum or plasma --1 day post xxx challenge