title: Usefulness of the lecithin/sphingomyelin ratio and uselessness of phosphatidylglycerol determinations in tracheal aspirates of preterm infants.
authors.forename: J B
authors.initials: JB
authors.lastname: Wijnands
authors.forename: M
authors.initials: M
authors.lastname: Esajas
authors.forename: J
authors.initials: J
authors.lastname: Egberts
mesh_terms: D006801:Humans; D007231:Infant, Newborn; D007234:Infant, Premature / Q000378:metabolism*; D010713:Phosphatidylcholines / Q000032:analysis*; D010715:Phosphatidylglycerols / Q000032:analysis*; D012127:Respiratory Distress Syndrome, Newborn / Q000175:diagnosis*; D013109:Sphingomyelins / Q000032:analysis*; D013396:Suction; D014132:Trachea / Q000378:metabolism*
chemical_list: D010713:Phosphatidylcholines; D010715:Phosphatidylglycerols; D013109:Sphingomyelins