 3. Men and women of reproductive potential must agree to practice an effective method of avoiding pregnancy including oral or implanted contraceptives, intrauterine device IUD, female condom, diaphragm with spermicide, cervical cap, use of a condom by the sexual partner or sterile sexual partner beginning at the time the informed consent is signed, and must agree to continue using such precautions while receiving IMRT through 6 weeks after the last dose of amifostine or RT, whichever is the last therapy discontinued; 