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Participation rates in the selection of population controls in a case-control study of colorectal cancer using two

Gemma Castaño-Vinyals1, Mark J Nieuwenhuijsen, Víctor Moreno

  • 1Center for Research in Environmental Epidemiology, Barcelona, Spain. gcastano@creal.cat

Gaceta Sanitaria
|June 28, 2011
PubMed
Abstract

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