[1] Azienda Osped Univ Pisana, Dipartimento Med Specialist, Sez Dipartimentale Piede Diabet, Pisa, Italy
[2] Ctr Piede Diabet, Clin San Carlo, Milan, Italy
[3] Univ Bologna, Chirurg Vasc Metropolitana Bologna, IRCCS Policlin S Orsola Bologna, Bologna, Emilia Romagna, Italy
[4] Univ Pisa, Dept Med, Diabet Foot Sect, Via Mario Selli 1, I-56124 Pisa, Italy