Manassakorn, JAnuman-Rajadhon, Y2009-05-272009-05-271980-03-01Manassakorn J, Anuman-Rajadhon Y. The effect of blood on lecithin/sphingomyelin (L/S) ratio and rapid surfactant test. Journal of the Medical Association of Thailand. 1980 Mar; 63(3): 173-5http://imsear.searo.who.int/handle/123456789/44724Chotmaihet Thangphaet.engAmniocentesisAmniotic Fluid --analysisBloodFemaleHumansPhosphatidylcholines --analysisPregnancySphingomyelins --analysisTime FactorsThe effect of blood on lecithin/sphingomyelin (L/S) ratio and rapid surfactant test.Journal Article