1 From the Helen Keller Foundation for Research and Education (F.K.), Birmingham, Alabama, USA; Department of Ophthalmology (F.K.), University of Pécs Medical School, Hungary.
2 Department of Ophthalmology (A.G.), University of Warmia and Mazury, Olsztyn, Poland; Institute for Research in Ophthalmology (A.G.), Foundation for Ophthalmology Development, Poznan, Poland. Electronic address: ae.grzybowski@gmail.com.