An international case-control study on h
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B. kΓ€llΓ©n; E. E. Castilla; E. Robert; P. A. L. Lancaster; M. Kringelbach; O. Mut
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Article
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1992
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Springer
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English
β 730 KB
The paper describes problems and advantages in an international cooperative study of a case-control design, aimed at investigating the possible association between exogenous hormones and hypospadias. The varying degrees of the ascertainment of specific exposures and risk factors, in spite of the use