title: The efficacy of postoperative radiotherapy for advanced head and neck cancer: quality of the evidence.
authors.forename: L J
authors.initials: LJ
authors.lastname: Peters
mesh_terms: D003131:Combined Modality Therapy; D006258:Head and Neck Neoplasms / Q000473:pathology / Q000532:radiotherapy* / Q000601:surgery*; D006801:Humans; D016555:Matched-Pair Analysis; D011184:Postoperative Period; D011879:Radiotherapy Dosage