title: Amniotic-fluid acetylcholinesterase and neural-tube defects: plea for standardisation.
mesh_terms: D000110:Acetylcholinesterase / Q000378:metabolism*; D000653:Amniotic Fluid / Q000201:enzymology*; D002802:Cholinesterases / Q000378:metabolism; D005260:Female; D006801:Humans; D007231:Infant, Newborn; D009436:Neural Tube Defects / Q000175:diagnosis*; D011247:Pregnancy; D011296:Prenatal Diagnosis; D009626:Terminology as Topic
chemical_list: D000110:Acetylcholinesterase; D002802:Cholinesterases