[1] Univ Naples Federico II, Dept Publ Hlth, Eye Clin, I-80131 Naples, Italy
[2] Med Univ Lublin, Chair & Dept Gen & Pediat Ophthalmol, PL-20079 Lublin, Poland
[3] Univ Trieste, Dept Med Surg & Hlth Sci, Eye Clin, I-34134 Trieste, Italy
[4] Univ Naples Federico II, Dept Neurosci & Reprod & Odontostomatol Sci, Eye Clin, I-80131 Naples, Italy
[5] Univ Zurich, Dept Ophthalmol, CH-8091 Zurich, Switzerland
[6] Univ Pisa, Dept Surg Med & Mol Pathol & Crit Care Med, I-56126 Pisa, Italy
[7] Med Univ Warsaw, Fac Med, PL-02091 Warsaw, Poland
[8] Univ Catania, Dept Ophthalmol, I-95124 Catania, Italy
[9] Magna Graecia Univ Catanzaro, Dept Ophthalmol, I-88100 Catanzaro, Italy