1. Thrombosis and Haemostasis Unit, I.R.C.C.S. Casa Sollievo della Sofferenza, S. Giovanni Rotondo, Italy
2. Department of Internal Medicine, Ospedale Fatebenefratelli, Napoli, Italy
3. Department of Internal Medicine, Hospital General Universitario Gregorio Marañón, Madrid, Spain
4. Department of Internal Medicine, Hospital Universitario La Paz, Madrid, Spain
5. Department of Internal Medicine, Hospital Universitario Virgen de la Arrixaca, Murcia, Spain
6. Department of Vascular Medicine, Hôpital de Rangueil, Toulouse, France
7. Department of Vascular Medicine, Hôpital Saint Eloi, Montpellier, France
8. Department of Internal Medicine, Hospital Universitario Reina Sofía, Córdoba, Spain
9. Department of Medical Genetics, University of Foggia, Foggia, Italy
10. Department of Internal Medicine, Hospital Universitario Germans Trias i Pujol de Badalona, Universidad Católica de Murcia, Barcelona, Spain