| Literature DB >> 4415323 |
M Smith, M P Vessey, W Bounds, J Warren.
Abstract
Keywords: Contraception; Contraceptive Agents; Contraceptive Agents, Female; Contraceptive Agents, Progestin; Contraceptive Effectiveness; Diseases; Family Planning; Pregnancy Complications; Pregnancy, Ectopic; Use-effectiveness
Mesh:
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Year: 1974 PMID: 4415323 PMCID: PMC1612168 DOI: 10.1136/bmj.4.5936.104-c
Source DB: PubMed Journal: Br Med J ISSN: 0007-1447