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ISSN:0020-7292|83|3|311-313

Elsevier‎(2003)‎

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By Schlecht N F   Franco E L   Rohan T E   Kjær S K   Schiffman M H   Moscicki A-B.   Duffy S W   in Journal of Epidemiology and Biostatistics

ISSN:1359-5229|6|5|393-407

Taylor & Francis Ltd‎(2001)‎

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