1. Eye Institute, Cleveland Clinic Abu Dhabi, Abu Dhabi, United Arab Emirates (UAE)
2. Maastricht University Medical Centre+, University Eye Clinic Maastricht, Maastricht, The Netherlands
3. Massachusetts Eye and Ear, Department of Ophthalmology, Harvard Medical School, Boston, Massachusetts, USA
4. Department of Ophthalmology, Leiden University Medical Center, Leiden, The Netherlands