title: Lecithin-sphingomyelin ratios in tracheal and pharyngeal aspirates in respiratory distress syndrome. A preliminary report.
mesh_terms: D001724:Birth Weight; D002855:Chromatography, Thin Layer; D005865:Gestational Age; D006801:Humans; D007231:Infant, Newborn; D007442:Intubation, Intratracheal; D008168:Lung / Q000378:metabolism; D008470:Meconium; D010614:Pharynx; D010713:Phosphatidylcholines / Q000032:analysis*; D011014:Pneumonia / Q000151:congenital / Q000378:metabolism; D011015:Pneumonia, Aspiration / Q000378:metabolism; D011379:Prognosis; D012127:Respiratory Distress Syndrome, Newborn / Q000175:diagnosis* / Q000378:metabolism; D013109:Sphingomyelins / Q000032:analysis*; D014132:Trachea
chemical_list: D010713:Phosphatidylcholines; D013109:Sphingomyelins