title: False negative maternal serum alpha-fetoprotein determinations in myelodysplasia: the role of ultrasound.
mesh_terms: D000110:Acetylcholinesterase / Q000032:analysis; D000328:Adult; D000653:Amniotic Fluid / Q000032:analysis*; D005188:False Negative Reactions; D005260:Female; D006801:Humans; D008297:Male; D009436:Neural Tube Defects / Q000175:diagnosis*; D011247:Pregnancy; D011296:Prenatal Diagnosis; D014463:Ultrasonography; D000509:alpha-Fetoproteins / Q000032:analysis* / Q000097:blood
chemical_list: D000509:alpha-Fetoproteins; D000110:Acetylcholinesterase