1 Department of Endocrinology, Diabetes and Metabolic Disorders, Dijon University Hospital, France; INSERM Unit, LNC-UMR 1231, University of Burgundy, Dijon, France.
2 University of Roma Tor Vergata, Roma, Italy.
3 Department of Orthopaedics and King's Diabetes Foot Clinic, King's College Hospital, Denmark Hill, London, UK.