1. Environmental-Occupational Health Sciences and Non Communicable Diseases Research Centre, Research Institute for Health Sciences, Chiang Mai University, Chiang Mai, Thailand
2. Department of Surgery, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand
3. National Institute for Health, Migration and Poverty (NIHMP), ADOI National Study Group Vulnology and Vascular Dermatology, Rome, Italy
4. Second Department of Internal Medicine, Diabetes Centre-Diabetic Foot Clinic, Democritus University of Thrace, Alexandroupolis, Greece