title: Correction of data delayed for 16 years.
authors.forename: O
authors.initials: O
authors.lastname: Olsen
mesh_terms: D003718:Denmark; D019317:Evidence-Based Medicine; D005260:Female; D006801:Humans; D011247:Pregnancy; D016032:Randomized Controlled Trials as Topic / Q000592:standards*; D016216:Ultrasonography, Prenatal