title: Letter: Beta-trace protein and neural-tube defects.
mesh_terms: D000653:Amniotic Fluid / Q000032:analysis; D000757:Anencephaly / Q000175:diagnosis*; D002986:Clinical Trials as Topic; D004677:Encephalocele / Q000175:diagnosis*; D005260:Female; D005865:Gestational Age; D006801:Humans; D008588:Meningocele / Q000175:diagnosis*; D011247:Pregnancy; D011296:Prenatal Diagnosis; D011506:Proteins / Q000032:analysis*; D012189:Retrospective Studies; D016135:Spinal Dysraphism / Q000175:diagnosis*
chemical_list: D011506:Proteins