7Udagawa H, Akiyama H. Surgical treatment of esophageal cancer: Tokyo experience of the three-field technique. Dis Esophagus, 2001, 14:110-114.
8Nishimaki T, Tanaka O, Suzuki T, et al. Patterns of lymphatic spread in thoracic esophageal cancer. Cancer, 1994, 74:4-11.
9Herbella FA, Del Grande JC, Colleoni R, et al. Anatomical analysis of the mediastinal lymph nodes of normal Brazilian subjects according to the classification of the Japanese Society for Diseases of the Esophagus. Surg Today, 2003, 33:249-253.
10Sharma D, Thakur A, Toppo S, et al. Lymph node counts in indians in relation to lymphadenectomy for carcinoma of the oesophagus and stomach. Asian J Surg, 2005, 28:116-120.