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Wu Z, Deng XY, Zeng RF, Su Y, Gu MF, Zhang Y, Xie CM, Zheng L. Analysis of risk factors for retropharyngeal lymph node metastasis in carcinoma of the hypopharynx. Head Neck. 2013 Sep;35(9):1274–7. doi: 10.1002/hed.23112. PMID: 22907638. |