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