| Literature DB >> 2537593 |
E J Gyorffy1, J E Bredfeldt, W C Black.
Abstract
Entities:
Keywords: Americas; Case Studies; Contraception; Contraceptive Methods--side effects; Demographic Factors; Developed Countries; Diseases; Family Planning; Liver Neoplasms--etiology; Longterm Effects; Neoplasms; North America; Northern America; Oral Contraceptives--side effects; Population; Population Dynamics; Research Methodology; Studies; Time Factors; United States
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Year: 1989 PMID: 2537593 DOI: 10.7326/0003-4819-110-6-489
Source DB: PubMed Journal: Ann Intern Med ISSN: 0003-4819 Impact factor: 25.391