T. Parvez, B. Parvez, and A. R. Allam, “CANCER ESOPHAGUS: TREATMENT MODALITIES”, Pak Armed Forces Med J, vol. 56, no. 1, pp. 60–67, Mar. 2006, Accessed: May 17, 2025. [Online]. Available: https://www.pafmj.org/PAFMJ/article/view/1427