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BMJ (Clinical Research Ed.)|April 25, 2000
Educational differences in smoking: international comparisonA E Cavelaars, A E Kunst, J J Geurts, et al.
Journal of Epidemiology and Community Health|June 9, 1998
Differences in self reported morbidity by educational level: a comparison of 11 western European countriesA E Cavelaars, A E Kunst, J J Geurts, et al.
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