title: The lecithin, cephalin, and sphingomyelin content of serum as indicated by the choline-phosphorus and nitrogen-phosphorus ratios.
mesh_terms: D002794:Choline; D054709:Lecithins; D009584:Nitrogen; D010714:Phosphatidylethanolamines; D010758:Phosphorus; D013109:Sphingomyelins
chemical_list: D054709:Lecithins; D010714:Phosphatidylethanolamines; D013109:Sphingomyelins; D010758:Phosphorus; C483858:phosphatidylethanolamine; D009584:Nitrogen; D002794:Choline