15. Have undergone any of the following procedures or experienced conditions currently or < 6 months: coronary artery bypass graft, angioplasty, vascular stent, myocardial infarction, angina pectoris, congestive heart failure [New York Heart Association (NYHA) grade ≥ 2], ventricular arrhythmias requiring continuous therapy, supraventricular arrhythmias, atrial fibrillation, haemorrhagic or thrombotic stroke, TIA or CNS bleeding.