Adjuvant radiation therapy in locally advanced head and neck cancer.
D006258:Head and Neck Neoplasms / Q000532:radiotherapy* / Q000601:surgery; D006801:Humans; D008207:Lymphatic Metastasis; D009364:Neoplasm Recurrence, Local / Q000517:prevention & control; D011182:Postoperative Care; D011300:Preoperative Care