Massive Endoscopic Screening for Esophageal and Gastric Cancers in a High-Risk Area of China. by Xianzhi Zheng, Xuhua Mao, Kun Xu, Lingshuang Lü, Xianzhen Peng, Min Wang, Guisheng Xu, Zhaolai Hua, Jianping Wang, Hengchuan Xue, Jianming Wang, Cheng Lu

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