1 Department of Biomedical and Dental Sciences and Morphofunctional Imaging, Regional Referral Center for the Ocular Surface Diseases, University of Messina, 98121 Messina, Italy.
2 Department of Ophthalmology, University Magna Graecia of Catanzaro, 88100 Catanzaro, Italy.
3 Ocular Surface Centre, ISPRE Ophthalmics, 16129 Genoa, Italy.