[Studies on the genetic and environmental epidemiology of esophageal cancer in seven families in Linxian County].
D000328:Adult; D000368:Aged; D002681:China; D003241:Consanguinity; D004777:Environment; D004938:Esophageal Neoplasms / Q000453:epidemiology / Q000235:genetics*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011795:Surveys and Questionnaires