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<http://webisa.webdatacommons.org/120341283>	<http://www.w3.org/ns/prov#value>	"POTTERN, L.M.; MORRIS, L.E.; BLOT, W.J.; ZIEGLER, R.G.; FRAUMENI, J.F. Esophageal cancer among black men in Washington, D.C.I, alcohol, tobaccco and other risk factors." .