1. Augenarzt‐Praxisgemeinschaft Gutblick Pfäffikon Switzerland
2. Department of Ophthalmology, Inselspital, Bern University Hospital University of Bern Bern Switzerland
3. Bern Photographic Reading Center, Inselspital University Hospital Bern Bern Switzerland
4. Department of Ophthalmology, Feinberg School of Medicine Northwestern University Chicago Illinois USA