 - The effects of radiation therapy on the developing human fetus at the recommended therapeutic dose can be abortifacient. For this reason, and because radiation therapy is known to be teratogenic, women of child-bearing potential and men must agree to use adequate contraception hormonal or barrier method of birth control; abstinence prior to study entry and for the duration of study participation. Should a woman become pregnant or suspect she is pregnant while participating in this study, she should inform her treating physician immediately. 