8. No previous chemotherapy or radiation If they are considered eligible and agree to participate, the patients will be registered and sign informed consent form. Radiation and chemotherapy will commence on the same day. IMRT is the only modality of radiation allowed. Blood samples will be collected and nutritional risk evaluated, using the Patient-Generated Subjective Global Assessment tool (PG-SGA). The PG-SGA and blood tests will be performed before, at the end of XRT treatment and four to six weeks after treatment is completed.