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Abstract
Mesh: See more » AdultChorionic Gonadotropin/urineFemaleHumansMethodsPregnancyPregnancy Complications/diagnosisPregnancy Trimester, FirstPregnancy, Ectopic/diagnosis
Substances: See more » Chorionic Gonadotropin
Year: 1991 PMID: 1859969 PMCID: PMC1670267 DOI: 10.1136/bmj.303.6793.57-a
Source DB: PubMed Journal: BMJ ISSN: 0959-8138