[1] Democritus Univ Thrace, Dept Internal Med 2, Outpatient Clin Diabet Foot, Alexandroupolis 68100, Greece
[2] Democritus Univ Thrace, Sch Med, Dept Med Stat, Alexandroupolis 68100, Greece
[3] Democritus Univ Thrace, Sch Med, Med Biol Lab, Alexandroupolis 68100, Greece