 - Concurrent chemoradiotherapy: Beginning 2 weeks after completion of induction chemotherapy, patients receive carboplatin and capecitabine as in induction chemotherapy. Patients also undergo intensity-modulated radiotherapy IMRT once daily on days 1-5, 8-12, 15-19, 22-26, and 29-33 and non-IMRT boost once daily on days 36-40 and 43-47. 