1. Venous Thromboembolism Unit, Department of Internal Medicine, Hospital General Universitario Gregorio Marañón
2. Instituto de Investigación Sanitaria Gregorio Marañón
3. Universidad Complutense de Madrid
4. Department of Internal Medicine, Hospital General Universitario Gregorio Marañón
5. Vascular & Interventional Radiology Unit, Hospital General Universitario Gregorio Marañón
6. Universidad CEU San Pablo