supported by The Radiation Therapy Major Project of the Ministry of Science and Technology of China(No.2016YFC0105711);supported partly by Natural Science Foundation of China(No.81401913)。
Objective:For locally advanced nasopharyngeal carcinoma(LA-NPC)patients,high incidences of distant metastases and severe treatment related toxicities are the main obstacles needed to be overcome.Raltitrexed,a specific...