Figure 1. Screening, Randomization, and Patient Flow in a Trial of Intensity-Modulated Radiation Therapy (IMRT) Alone for Low-risk Nasopharyngeal Carcinoma.

^aSubcategorical numeric values exceed 240 because 56 patients had more than 1 adverse feature.

^bRandomization was stratified by trial center and staging subset.

EBV indicates Epstein-Barr virus.