1. Department of Angiology and Vascular Surgery, IBSAL-Hospital Universitario de Salamanca, Spain
2. Department of Angiology and Vascular Surgery, Hospital de Mataro, Barcelona, Spain
3. Primary Care Physician of Centro de Salud de Abaran, Murcia, Spain
4. Department of Hematology, IBSAL-Universidad de Salamanca, Salamanca, Spain
5. Department of Angiology and Vascular Surgery, Hospital de la Santa Creu i Sant Pau, Barcelona, Spain
6. Department of Angiology and Vascular Surgery, Hospital Universitario La Fe, Valencia, Spain
7. Primary Care Physician of Centro de Salud Pintores, Parla, Madrid, Spain