Smoking and Elevated Preneoadjuvant Chemoradiotherapy Serum Carcinoembryonic Antigen Levels Are Associated With High Tumor Regression Grade and Poor Survival in Patients With Local... by Jen‐Pin Chuang, Hsiang‐Lin Tsai, Po‐Jung Chen, Ching‐Wen Huang, Wei‐Chih Su, Tsung‐Kun Chang, Yen‐Cheng Chen, Ching‐Chun Li, Yung‐Sung Yeh, Jaw‐Yuan Wang

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