1. Thrombosis and Hemostasis Center, University of California, Davis Health System, Sacramento, California
2. Laboratory Corporation of America, Burlington, North Carolina
3. Department of Hematology and Blood Transfusion, School of Allied Medicine, Iran University of Medical Sciences, Tehran, Iran
4. Department of Haematology, Sydney Centres for Thrombosis and Haemostasis, Institute of Clinical Pathology and Medical Research (ICPMR), NSW Health Pathology, Westmead Hospital, Westmead, New South Wales, Australia
5. Dipartimento di Scienze Neurologiche e del Movimento, Sezione di Biochimica Clinica, Universita degli Studi di Verona, Verona, Italy
6. Centro Hospitalar e Universitário de Coimbra, Coimbra, Portugal
7. Coagulation Department, Our Lady's Children's Hospital, Crumlin, Dublin, Ireland
8. Service d'hématologie Biologique, Hôpital Lariboisière, Université Paris Descartes, Paris, France