Creatinine.periton fld/Creatinine.serum:RelRto:Pt:Periton fld+Ser/Plas:Qn
creatinine.periton fld/creatinine.serum:relrto:pt:periton fld+ser/plas:qn
Creatinine in peritoneal fluid/Creatinine in serum (Periton fld+S/P) [Relative ratio]
creatinine in peritoneal fluid/creatinine in serum (periton fld+s/p) [relative ratio]