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, Rome, Italy
3. NCD Center of Excellence, Research Institute of Health Sciences at Chiang Mai University, Chiang Mai, Thailand
4. Department of Surgery, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand