1. Geriatric Section, Department of Medicine, University Hospital, Tromsoe, Norway
2. Institute of Clinical Haemostaseology and Transfusion Medicine, University of Saarland, Homburg, Germany
3. Department of General, Visceral and Vascular Surgery, Hospital Worms, Worms, Germany
4. Department of Transfusion Medicine and Haemostaseology, University Clinic Munich, Munich, Germany