Induction chemotherapy will be administered every 2 weeks for 6 cycles (about 3 months). Patients who have radiological evidence of progressive disease will be shifted to salvage chemotherapy. Patients who have responsive or stable disease after induction chemotherapy will receive concurrent chemoradiotherapy 3-4 weeks after the last dose of induction chemotherapy. Surgical evaluation will be performed 4-6 weeks after the completion of chemoradiotherapy. Patients who have resectable disease will undergo surgical resection. Postoperative adjuvant chemotherapy with GOFL for 6 cycles will be given for those who have curative resection. Patients who still have unresectable disease or non-curative resection will receive systemic chemotherapy of GOFL till disease progression or unacceptable toxicity.