Figure 1

Kaplan-Meier overall survival, progression-free survival and distant metastasis- free survival curves for 130 nasopharyngeal cancer patients treated with IMRT stratified by pre- treatment primary tumor volume.
Kaplan-Meier overall survival, progression-free survival and distant metastasis- free survival curves for 130 nasopharyngeal cancer patients treated with IMRT stratified by pre- treatment primary tumor volume.