The use of exfoliative cytology in clinical diagnosis and mass surveys for cancer of the esophagus.
D000328:Adult; D002294:Carcinoma, Squamous Cell / Q000473:pathology*; D002681:China; D004938:Esophageal Neoplasms / Q000473:pathology*; D006801:Humans; D008403:Mass Screening / Q000295:instrumentation; D008722:Methods