[1] Univ Enna Kore, Dept Med & Surg, I-94100 Enna, Italy
[2] Catania Univ, San Marco Hosp, Eye Clin, I-95121 Catania, Italy
[3] Azienda Sanitaria Friuli Occidentale, Dept Ophthalmol, I-33170 Pordenone, Italy
[4] Univ Benin, Dept Optometry, Benin 300238, Edo, Nigeria
[5] Imperial Coll, Imperial Coll Ophthalm Res Grp ICORG Unit, London NW1 5QH, England
[6] Univ Naples Federico II, Dept Neurosci Reprod Sci & Dent, I-80131 Naples, Italy
[7] Fidia Ophthalm, I-95125 Catania, Italy
[8] Giovanni Paolo II Hosp, Dept Obstet & Gynecol, I-97100 Ragusa, Italy
[9] Univ Hosp Udine, Dept Ophthalmol, I-33100 Udine, Italy