- Arm I: Patients receive androgen suppression therapy comprising luteinizing hormone-releasing hormone (LHRH) agonist (e.g., leuprolide acetate, goserelin, buserelin, or triptorelin) and oral antiandrogen (i.e., oral flutamide 3 times daily for 2 months or oral bicalutamide once daily for 2 months). Beginning at week 8, patients undergo radiotherapy 5 days a week for approximately 8 weeks. Antiandrogen therapy is discontinued at completion of radiotherapy, but LHRH agonist therapy continues for 20 months.