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4 - Chiu PWY, Chan ACW, Leung SF, Leong HT, Kwong KH, Li MKW, et al. Multicenter prospective randomized trial comparing standard esophagectomy with chemoradiotherapy for treatment of squamous esophageal cancer: early results from the Chinese University Research Group for Esophageal Cancer (CURE). J Gastrointest Surg. 2005;9(6):794-802.