- Arm I: Patients undergo radiotherapy 5 days a week for 6 weeks. Patients also undergo high-dose rate, low-dose rate, or boost brachytherapy. Patients receive cisplatin IV beginning on day 1 of radiotherapy and continuing weekly for 6 weeks. Patients also receive epoetin beta subcutaneously 3 times a week beginning 2 weeks before radiotherapy and continuing for 8 weeks.