1. Ophthalmology Unit, DAI Head/Neck, Umberto I Policlinic, University of Rome “Sapienza”, Viale del Policlinico 155, 00161 Rome, Italy
2. Ophthalmology Unit, Department of Sense Organs, University of Rome “Sapienza”, Viale del Policlinico 155, 00161 Rome, Italy
3. Section of Ophthalmology, Policlinico Militare di Roma, Piazza Celimontana 50, 00184 Roma, Italy
4. Ophthalmology Unit, St. Andrea Hospital, NESMOS Department, University of Rome “Sapienza”, Via di Grottarossa 1035-1039, 00189 Rome, Italy