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letter

. 1994 Oct;35(10):1506. doi: 10.1136/gut.35.10.1506

Risk factors for symptomatic gall bladder disease.

C Thijs, P Knipschild, P Leffers

PMCID: PMC1375037 PMID: 7959216

1506

Selected References

These references are in PubMed. This may not be the complete list of references from this article.

McMichael A. J., Baghurst P. A., Scragg R. K. A case-control study of smoking and gallbladder disease: importance of examining time relations. Epidemiology. 1992 Nov;3(6):519–522. doi: 10.1097/00001648-199211000-00010. [DOI] [PubMed] [Google Scholar]
Thijs C., Knipschild P., Leffers P. Pregnancy and gallstone disease: an empiric demonstration of the importance of specification of risk periods. Am J Epidemiol. 1991 Jul 15;134(2):186–195. doi: 10.1093/oxfordjournals.aje.a116071. [DOI] [PubMed] [Google Scholar]
Thijs C., Knipschild P. Oral contraceptives and the risk of gallbladder disease: a meta-analysis. Am J Public Health. 1993 Aug;83(8):1113–1120. doi: 10.2105/ajph.83.8.1113. [DOI] [PMC free article] [PubMed] [Google Scholar]
Thijs C., Leffers P., Knipschild P. Control of confounding requires specification of risk periods. Epidemiology. 1993 Nov;4(6):556–557. doi: 10.1097/00001648-199311000-00014. [DOI] [PubMed] [Google Scholar]

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