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http://www.researchgate.net/profile/Susan_Mayne/publication/10412040_Population_Attributable_Risks_of_Esophageal_and_Gastric_Cancers/links/0deec53c947bdd2cde000000/Population-Attributable-Risks-of-Esophageal-and-Gastric-Cancers.pdf
ResearchGate
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http://www.onacademic.com/detail/journal_1000037417668010_a742.html
onacademic.com
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http://pdfs.semanticscholar.org/2358/00b45b1bdb02a036d0c653fb68c09cc7b185.pdf
pdfs.semanticscholar.org
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Citeseer
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http://jnci.oxfordjournals.org/cgi/reprint/95/18/1404.pdf
Oxford Univ Press
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