Protein.plr fld/Protein.serum:RelRto:Pt:Ser/Plas+Plr fld:Qn
protein.plr fld/protein.serum:relrto:pt:ser/plas+plr fld:qn
Protein in pleural fluid/Protein in serum (S/P+Pleur fld) [Relative ratio]
protein in pleural fluid/protein in serum (s/p+pleur fld) [relative ratio]