1. Medical Clinic II; Institute of Transfusion Medicine; Goethe University; Frankfurt Germany
2. Division of Haematology and Haemostaseology; Department of Medicine I; Medical University; Vienna Austria
3. Department of Angiology and Haemostaseology; Vivantes Clinic; Berlin Germany
4. II. Medical Clinic; University Clinic Eppendorf; Hamburg Germany
5. Suedharzklinikum; Nordhausen Germany
6. Hannover Medical School; Hannover Germany
7. Institute for Thrombophilia and Haemaostaseology; Münster Germany
8. Center of Haemostasis; MVZ Labor Leipzig; Germany
9. Kantonsspital; Lucerne Switzerland
10. Institute of Haemostaseology and Transfusion Medicine; University Hospital; Homburg/Saar Germany