Creatinine dial fld/Creatinine ser_plas:RelRto:Pt:Dial fld+Ser/Plas:Qn
creatinine dial fld/creatinine ser_plas:relrto:pt:dial fld+ser/plas:qn
Creatinine in dialysis fluid/Creatinine in serum or plasma
creatinine in dialysis fluid/creatinine in serum or plasma