1. Department of Ophthalmology, Government Medical College and Hospital, Chandigarh 160030, India
2. Massachusetts Eye and Ear, Department of Ophthalmology, Harvard Medical School, Boston, MA 02114, USA
3. Department of Ophthalmology, Campus Bio-Medico University, 00128 Rome, Italy
4. Fondazione Policlinico Universitario Campus Bio-Medico, 00128 Rome, Italy
5. Department of Ophthalmology, University Hospital of Udine, p.le S. Maria della Misericordia 15, 33100 Udine, Italy
6. Eye Clinic, Policlinico Umberto I, “Sapienza” University of Rome, 00142 Rome, Italy
7. Department of Optometry, University of Benin, Benin City 300238, Edo State, Nigeria
8. Faculty of Medicine and Surgery, University of Enna “Kore”, Piazza dell’Università, 94100 Enna, Italy
9. Eye Clinic, Catania University, San Marco Hospital, Viale Carlo Azeglio Ciampi, 95121 Catania, Italy
10. Department of Ophthalmology, University of California San Diego, La Jolla, CA 92122, USA