<qa>  What is the primary endpoint of the primary site?Patients will be treated with definitive external beam radiation plusminus chemotherapy plusminus neck dissection in the ipsilateral neck post radiation. The primary site will be treated with definitive radiation therapy, or definitive surgery plus post-operative radiation therapy. Primary endpoints are loco-regional control, as well as quality of life, xerostomia, mucositis, and neck fibrosis. 