1. Division of Angiology and Haemostasis; Faculty of Medicine; Geneva University Hospitals; Geneva Switzerland
2. Department of Genetic Medicine and Development; University Medical School of Geneva; Geneva Switzerland
3. Haematology Division; Faculty of Medicine; Geneva University Hospitals; Geneva Switzerland
4. Pediatric Hematology Unit; Faculty of Medicine; Gazi University; Ankara Turkey
5. Coagulation Laboratory; Ghent University Hospital; Ghent Belgium
6. Department of Pediatric Hemato-oncology and Stem Cell Transplantation; Ghent University Hospital; Ghent Belgium
7. Service et Laboratoire central d'Hématologie; Centre Hospitalier Universitaire Vaudois; Lausanne Switzerland