1 Diabetes Centre-Diabetic Foot Clinic, Second Department of Internal Medicine, Democritus University of Thrace, Alexandroupolis, Greece.
2 National Institute for health, migration and poverty (NIHMP), ADOI National study group Vulnology and vascular dermatology, Rome, Italy.
3 Environmental-Occupational Health Sciences and Non Communicable Diseases Research Group, Research Institute for Health Sciences, Chiang Mai University, Chiang Mai, Thailand.
4 Department of Surgery, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand.