Prognostic significance of the number of negative lymph node on the survival of patients with thoracic esophageal cancer
DU Ze-sen，WU Zhi-yong，ZHENG Chun-peng，LI Zhuo-yi，FU Jun-hui
Carcinogenesis, Teratogenesis & Mutagenesis . 2012, (1): 64 -67 .  DOI: 10.3969/j.issn.1004-616x.2012.01.015