Preparing dose prescription, and submitting, designing, and evaluating plan
All patients received IMRT. The prescribed dose was 68–72 Gy, 68–70 Gy, 60–62 Gy, and 54–56 Gy, in 30–32 fractions, for the planning target volumes derived from GTVnx, GTVnd, CTV1, and CTV2, respectively. QUANTEC (2012 Standard) was referred for limiting dose to OAR.