[1] Univ Milan, San Giuseppe Hosp, Dept Clin Sci & Community Hlth, IRCCS Multimed,Eye Clin, I-20123 Milan, Italy
[2] Univ Milan, Ocular Surface & Dry Eye Ctr, ASST Fatebenefratelli Sacco, I-20133 Milan, Italy
[3] Univ Cagliari, Dept Surg Sci, Eye Clin, I-09123 Cagliari, Italy
[4] Univ Campus Biomed, Ophthalmol Operat Complex Unit, I-00128 Rome, Italy
[5] Univ Messina, Dept Biomed Sci, Ophthalmol Clin, I-98100 Messina, Italy
[6] ISPRE Ophthalm, Ocular Surface Unit, I-16129 Genoa, Italy