| Literature DB >> 5070883 |
F Cockburn, J W Farquhar, J O Forfar, M Giles, S P Robins.
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Year: 1972 PMID: 5070883 DOI: 10.1111/j.1471-0528.1972.tb12903.x
Source DB: PubMed Journal: J Obstet Gynaecol Br Commonw ISSN: 0022-3204