1 Helsinki Retina Research Group, Faculty of Medicine, University of Helsinki, Helsinki, Finland; Eye Centre, Kymenlaakso Central Hospital, Kotka, Finland. Electronic address: raimo.tuuminen@helsinki.fi.
2 Hygeia Clinic, Gdańsk, Poland.
3 Department of Ophthalmology, University of Warmia and Mazury, Olsztyn, Poland; Institute for Research in Ophthalmology, Foundation for Ophthalmology Development, Poznań, Poland.