1. Department of Medical Surgical and Neurological Science, Dermatology Section University of Siena Santa Maria alle Scotte Hospital SienaItaly
2. Department of Dermatology University Hospital of Saint‐Etienne 42055 Saint‐Etienne cedex 2France
3. Department of Ophthalmology; University Hospital of Saint‐Etienne 42055 Saint‐Etienne cedex 2France
4. Laboratory of Biology, Engineering and Corneal Graft Imaging Jean Monnet University 42000 Saint‐EtienneFrance
5. French University Institute Boulevard Saint‐Michel 75005 Paris France