title: Evaluation of a clinical test. II: Assessment of validity.
authors: Department of Obstetrics and Gynaecology, Ninewells Hospital, Dundee, UK.
authors: P F
authors: PF
authors: Chien
authors: K S
authors: KS
authors: Khan
mesh_terms: D005260:Female; D006801:Humans; D011247:Pregnancy; D011296:Prenatal Diagnosis / Q000592:standards*; D011336:Probability; D012015:Reference Standards; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity