title: When marginal costs and benefits should be used in screening.
authors.forename: N
authors.initials: N
authors.lastname: Wald
authors.forename: H
authors.initials: H
authors.lastname: Watt
mesh_terms: D003362:Cost-Benefit Analysis; D004314:Down Syndrome / Q000175:diagnosis*; D005260:Female; D006801:Humans; D011247:Pregnancy; D011296:Prenatal Diagnosis / Q000191:economics*