title: False-negative results in Down's syndrome screening.
authors.forename: P
authors.initials: P
authors.lastname: Cavalli
mesh_terms: D000328:Adult; D003936:Diagnosis, Computer-Assisted; D004314:Down Syndrome / Q000175:diagnosis*; D005188:False Negative Reactions; D005260:Female; D006801:Humans; D011247:Pregnancy; D011296:Prenatal Diagnosis; D012984:Software