| http://www.w3.org/ns/prov#value | - Secondary - Assess the impact of the addition of cetuximab to postoperative IMRT on disease-free survival (DFS) of these patients. - Assess the impact of the addition of cetuximab to postoperative IMRT on acute and late dysphagia, xerostomia, skin toxicity, and other toxicities according to common Toxicity Criteria for Adverse Effects (CTCAE), v. 4 and their relationships with patient-reported out
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