 - Subjects who, in the investigators judgement, are perceived as having an increased risk of bleeding, e.g. history of haemorrhagic disorders, clinical relevant petechial bleeding, occult blood in faeces, haematuria in repeated urine tests, trauma or surgery within the last month planned surgery during trial participation, history of arteriovenous malformation or aneurysm, history of gastroduodenal ulcer disease or gastrointestinal haemorrhage, history of intracranial, intraocular, spinal, retroperitoneal, or atraumatic intraarticular bleeding, use of drugs that may interfere with haemostasis during trial conduct e.g. acetylic salicylic acid or other non-steroidal anti-inflammatory drugs 