13. Patients with clinically significant cardiovascular disease. This includes: 1) Uncontrolled hypertension, defined as systolic > 140 mm Hg or diastolic > 90 mm Hg; 2) Myocardial infarction or unstable angina < 6 months prior to registration; 3) New York Heart Association (NYHA) Grade II or greater congestive heart failure; 4) Serious cardiac arrhythmia requiring medication. This does not include asymptomatic, atrial fibrillation with controlled ventricular rate