1. Department of Thrombosis and Hemostasis, Leiden University Medical Center, Leiden, The Netherlands
2. Department of Internal Medicine, Haga Teaching Hospital, The Hague, The Netherlands
3. Department of Internal Medicine and Chest Diseases, Groupe d'Etude de la Thrombose de Bretagne Occidentale, Equipe d'Accueil 3878, Hôpital de la Cavale Blanche, CHRU, Brest, France
4. Centre d'Investigation Clinique INSERM 1412, University of Brest, Brest, France