1. Ophthalmology Department, Ospedale di Circolo e Fondazione Macchi, ASST Sette Laghi, 21100 Varese, Italy
2. Department of Biomedical, Surgical and Dental Sciences, University of Milan, 20122 Milan, Italy
3. Eye Clinic, IRCCS MultiMedica, 20138 Milan, Italy
4. Eye Clinic, University Hospital Maggiore della Carità, 28100 Novara, Italy
5. Ophthalmology Department, Ospedale A. Manzoni, 23900 Lecco, Italy