Urea nitrogen^post dialysis/pre dialysis:MRto:Pt:Dial fld prt:Qn
urea nitrogen^post dialysis/pre dialysis:mrto:pt:dial fld prt:qn
Urea nitrogen^post dialysis/pre dialysis:Mass Ratio:To identify measures at a point in time:Dialysis fluid prt:Quantitative
urea nitrogen^post dialysis/pre dialysis:mass ratio:to identify measures at a point in time:dialysis fluid prt:quantitative