1. 2nd Medical Department and Diabetes Centre, NIMTS Hospital, 12 Monis Petraki, 11521 Athens, Greece
2. Department of Diabetes, Saint Bartholomew's Hospital, University of London and Bizard Institute, EC1A 7BE London, UK
3. Outpatient Clinic of the Diabetic Foot, Second Department of Internal Medicine, Democritus University of Thrace, 68100 Alexandroupolis, Greece
4. Department of Endocrinology, Diabetology and Nutrition, Jean Verdier Hospital, AP-HP, Paris Nord University, CRNH-IdF, CINFO, 93140 Bondy, France
5. Division of Experimental Diabetes and Aging, Mount Sinai School of Medicine, 1 Gustave L, Levy Place, P.O. Box 1460, New York City, NY 10029, USA