Surgical factors influence the outcome after Ivor-Lewis esophagectomy with intrathoracic anastomosis for adenocarcinoma of the esophagogastric junction: a consecutive series of 240 patients at an experienced center - Ott, K; Bader, F G; Lordick, F; Feith, M; Bartels, H; Siewert, J R (Ann Surg Oncol, 2009)