Cotton, D B Effect of blood contamination on lecithin to sphingomyelin ratio in amniotic fluid by different detection methods. [electronic resource] - Clinica chimica acta; international journal of clinical chemistry Mar 1984 - 299-304 p. digital Publication Type: Journal Article ISSN: 0009-8981 Standard No.: 10.1016/0009-8981(84)90118-9 doi Subjects--Topical Terms: Amniotic Fluid--analysisChromatography, Thin LayerFemaleHumansPhosphatidylcholines--analysisPregnancySpecimen HandlingSphingomyelins--analysis