1. University of Florence; Department of Translational Surgery and Medicine, Eye Clinic; Largo Brambilla, 3 Florence Italy 50134
2. University of Udine, Azienda Ospedaliero-universitaria di Udine; Department of Ophthalmology; Udine Italy
3. Università degli Studi di Milano; Dipartimento di Scienze Biomediche e Cliniche "L. Sacco"; via GB Grassi 74 Milan Italy 20157
4. Queen's University Belfast; Centre for Experimental Medicine; Grosvenor Road Belfast UK BT12 6BA
5. Royal Victoria Hospital; Grosvenor Road Belfast UK BT12 6BA
6. Johns Hopkins Bloomberg School of Public Health; Department of Epidemiology; 615 N. Wolfe Street Baltimore Maryland USA 21205
7. Fondazione G.B. Bietti per lo studio e la ricerca in Oftalmolologia-IRCCS; Ophthalmology; Via Livenza n 3 Rome Italy 00198