1. Angelo Bianchi Bonomi Hemophilia and Thrombosis Center; Department of Clinical Sciences and Community Health; Università degli Studi di Milano and IRCCS Maggiore Hospital Foundation; Milano Italy
2. Department of Angiology and Blood Coagulation; University Hospital Sant'Orsola-Malpighi; Bologna Italy
3. Coagulation Laboratory; Department of Laboratory Medicine; Ghent-University Hospital; Ghent Belgium
4. Quest Diagnostics; Chantilly VA USA
5. Department of Medical and Biological Sciences; University of Udine; Udine Italy
6. Department of Laboratory Medicine; ASUI UD; University Hospital; Udine Italy
7. National Institute for Biological Standards and Controls; Potters Bar UK
8. Laboratorio Central del Hospital Italiano de Buenos Aires; Instituto Universitario del Hospital Italiano; Buenos Aires Argentina
9. Haemostasis Laboratory; Department of Transfusion Medicine; ASUI TS; University Hospital of Cattinara; Trieste Italy
10. Coagulation Laboratory; Leipzig Germany
11. Department of Clinical Pathology; St John's Medical College Hospital; Bangalore India
12. Assistance Publique des Hopitaux de Marseille; Marseille France
13. Institut National pour la Santé et la Recherche Médicale (INSERM); Unité Mixte de Recherche en Santé (UMR_S) 1062; Nutrition Obesity and Risk of Thrombosis; Aix-Marseille University; Marseille France
14. Haemostasis and Thrombosis Center; General Hospital; Cremona Italy