Upper alimentary tract cancer in Natal Indians with special reference to the betel-chewing habit.
D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D001114:Areca; D002648:Child; D002675:Child, Preschool; D004493:Education; D004938:Esophageal Neoplasms / Q000453:epidemiology; D005006:Ethnicity; D005260:Female; D005770:Gastrointestinal Neoplasms / Q000209:etiology*; D006801:Humans; D007194:India; D007223:Infant; D008297:Male; D008875:Middle Aged; D009062:Mouth Neoplasms / Q000453:epidemiology; D009909:Oral Health; D010610:Pharyngeal Neoplasms / Q000453:epidemiology; D010946:Plants, Medicinal; D012067:Religion; D012737:Sex Factors; D013019:South Africa; D013274:Stomach Neoplasms / Q000453:epidemiology