1. Domestic and Specialized Medicine Centre “Dilmed,”Katowice, Poland
2. Department of Molecular Biology, Medical University of Silesia, Sosnowiec, Poland
3. Department of Ophthalmology, Poznan City Hospital, Poznan, Poland and Medical Faculty, University of Warmia and Mazury, Olsztyn, Poland
4. Department of Ophthalmology, Medical University of Silesia, Independent Public Clinical Hospital, Katowice, Poland