 - Any of the following conditions within 6 months of enrollment: myocardial infarction, severeunstable angina, symptomatic congestive heart failure, cerebrovascular accident or transient ischemic attack, coronaryperipheral artery bypass grafting; patients who have experienced a pulmonary embolus, deep venous thrombosis or other clinically significant thromboembolic event within 6 months of enrollment are eligible if they are clinically stable on anticoagulation therapy 