Phenylalanine/Tyrosine:MRto:Pt:Ser/Plas:Qn
phenylalanine/tyrosine:mrto:pt:ser/plas:qn
Phenylalanine/Tyrosine:Mass Ratio:To identify measures at a point in time:Serum/Plasma:Quantitative
phenylalanine/tyrosine:mass ratio:to identify measures at a point in time:serum/plasma:quantitative