1. Department of Ophthalmology, Istituto Clinico Humanitas, Rozzano, Milano
2. Private Practice Ophthalmologist, Milano
3. Medical Center San Biagio, Fossalta di Portogruaro, Venezia
4. Department of Cephalic and Scheletric District, University Hospital, Siena
5. Ocular Microsurgery Center, Monza
6. Department of Ophthalmology, Umberto I Hospital, Siracusa
7. Department of Ophthalmology, Ospedale Maggiore, Bologna
8. Department of Ophthalmology, S.G. Moscati Hospital, Avellino - Italy