Kapil, USrivastav, MNayar, D1993-07-012009-06-041993-07-012009-06-041993-07-01Kapil U, Srivastav M, Nayar D. Vitamin 'A' and oesophageal cancer. Tropical Gastroenterology. 1993 Jul-Sep; 14(3): 87-90http://imsear.searo.who.int/handle/123456789/12480951 references.engEsophageal Neoplasms --etiologyHumansVitamin A --physiologyJournal Article