 Arm III: discontinued as of 031013 Patients undergo mid-dose 61.2 Gy given in 34 treatments thoracic radiotherapy once daily, 5 days a week, during the initial 16 days approximately 3 weeks of treatment and then twice daily, 5 days a week, for the final 9 days approximately 2 weeks of treatment. Patients also receive cisplatin and etoposide. 