Phenylalanine/Tyrosine:SRto:Pt:Ser/Plas:Qn
phenylalanine/tyrosine:srto:pt:ser/plas:qn
Phenylalanine/Tyrosine:Substance Ratio:To identify measures at a point in time:Serum/Plasma:Quantitative
phenylalanine/tyrosine:substance ratio:to identify measures at a point in time:serum/plasma:quantitative