6. History of other malignancy within 2 years of study entry which could affect compliance with the protocol or interpretation of results. Patients with a history of curatively treated basal or squamous cell carcinoma of the skin or in situ carcinoma of the cervix, low grade, early-stage, localized prostate cancer treated surgically with curative intent, ductal carcinoma in situ (DCIS) of the breast treated with curative intent, are generally eligible. These cases should be discussed with the study chair or study co-chair prior to enrollment.