1. Diabetes Centre-Diabetic Foot Clinic, Second Department of Internal
Medicine, Democritus University of Thrace, University Hospital of
Alexandroupolis, Greece
2. Institute for Clinical Diabetology, German Diabetes Center, Leibniz
Center for Diabetes Research at Heinrich-Heine-University Düsseldorf,
Düsseldorf, Germany
3. German Center for Diabetes Research, Partner Düsseldorf,
München-Neuherberg, Germany
4. Department of Medical Statistics, Medical School, Democritus University
of Thrace, Alexandroupolis, Greece
5. Department of Neurology, Democritus University of Thrace, University
Hospital of Alexandroupolis, Greece