1. Unité Mixte de Recherche/Centre National de la Recherche Scientifique 5558, Faculté de Médecine René Thomas Hyacinthe Laennec, University of Lyon, Lyon, France;
2. Division of Angiology and Hemostasis, University Hospital, Geneva, Switzerland;
3. Institut National de la Santé et de la Recherche Médicale, Centre d'Investigation Clinique/Epidémiologie Clinique-3, EA3065, and Department of Medicine and Therapeutics, North Hospital, Saint Etienne University Hospital, Saint Etienne, France;
4. Institut National de la Santé et de la Recherche Médicale, Centre d'Investigation Clinique 1001, EA2992, and Vascular Medicine Department, Saint Eloi Hospital, Montpellier University Hospital, Montpellier, France; and
5. Thromboembolism Unit, University of Padua, Padua, Italy