The epidemiology of esophageal cancer in north China and preliminary results in the investigation of its etiological factors.
D000367:Age Factors; D000818:Animals; D001205:Ascorbic Acid / Q000494:pharmacology; D001593:Benzyl Compounds / Q000494:pharmacology; D002277:Carcinoma / Q000453:epidemiology / Q000401:mortality / Q000473:pathology; D002645:Chickens; D002681:China; D004935:Esophageal Diseases / Q000453:epidemiology; D004938:Esophageal Neoplasms / Q000453:epidemiology / Q000401:mortality / Q000473:pathology; D005260:Female; D005506:Food Contamination / Q000032:analysis; D006801:Humans; D006965:Hyperplasia / Q000453:epidemiology; D008297:Male; D009566:Nitrates / Q000652:urine; D009602:Nitrosamines / Q000032:analysis / Q000494:pharmacology; D051381:Rats
D001593:Benzyl Compounds; D009566:Nitrates; D009602:Nitrosamines; D001205:Ascorbic Acid