8. Severe, active co-morbidity, defined as follows: a. Unstable angina and/or congestive heart failure requiring hospitalization within the last 6 months. b. Transmural myocardial infarction within the last 6 months. c. Acute bacterial or fungal infection requiring intravenous antibiotics at the time of registration. d. Chronic Obstructive Pulmonary Disease exacerbation or other respiratory illness requiring hospitalization or precluding study therapy within 30 days before registration. e. Hepatic insufficiency resulting in clinical jaundice and/or coagulation defects; note, however, that laboratory tests for liver function and f. Acquired Immune Deficiency Syndrome (AIDS) based upon current CDC definition; note, however, that HIV testing is not required for entry into this protocol. Protocol-specific requirements may also exclude immuno-compromised patients.