The feasibility of contralateral lower neck sparing intensity modulation radiated therapy for nasopharyngeal carcinoma patients with unilateral cervical lymph node involvement. - Tang, Ling-Long; Tang, Xin-ran; Li, Wen-fei; Chen, Lei; Tian, Li; Lin, Ai-Hua; Sun, Ying; Ma, Jun (Oral Oncology, 2017)