14. For patients with previous invasive cancers (including breast cancer) treated with curative intent, completion of chemotherapy or radiation therapy more than 5 years prior to enrollment for this study and no evidence of recurrent disease. Patients may be receiving anti-estrogen hormonal therapy prescribed for previous invasive breast cancer as long as the diagnosis of invasive cancer was made more than 5 years prior to study enrollment. Patients may be using anti-estrogen hormonal therapy at the time of current diagnosis but must discontinue this therapy before beginning study treatment.