1. Angiology Department, MD Barbantini Clinic, Lucca, Italy
2. Heart and Vascular Surgery Department, University of Siena, Siena, Italy
3. Outpatient Department for Hard-to-Heal skin ulcers, San Giuseppe Hospital, Empoli, Italy
4. Vascular Ulcers and Diabetic Foot Surgery Unit, Villa Fiorita Clinic, Prato, Italy
5. Surgery Department, Valdisieve Hospital, Florence, Italy
6. Vascular Medicine Dpt. USL Toscana Centro, Florence, Italy
7. Angiomedica Clinic, Colle di Val d’Elsa, Siena, Italy
8. Institute of Clinical Physiology, Italian National Research Council e CNR, Pisa, Italy
9. Emeritus, Medical University of Vienna, Vienna, Austria