1. Division of Vascular Surgery, Vita-Salute San Raffaele University, IRCCS San Raffaele Hospital, Milan, Italy
2. Serviço de Cirurgia Vascular, Hospital de Santa Maria, Lisboa, Portugal
3. Vascular Surgery Unit, Department of Cardiothoracic Vascular, Azienda Ospedaliero Universitaria Pisana, Pisa, Italy