Lecithin/Sphingomyelin:Ratio:Pt:Amnio fld:Qn
lecithin/sphingomyelin:ratio:pt:amnio fld:qn
Lecithin/Sphingomyelin:Ratio:To identify measures at a point in time:Amniotic fluid:Quantitative
lecithin/sphingomyelin:ratio:to identify measures at a point in time:amniotic fluid:quantitative