title: A survey on the familial aggregation of esophageal cancer in Yangcheng County.
mesh_terms: D000328:Adult; D000368:Aged; D002681:China; D004198:Disease Susceptibility; D004938:Esophageal Neoplasms / Q000235:genetics* / Q000401:mortality; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D012189:Retrospective Studies; D011795:Surveys and Questionnaires