1. Department of Ophthalmology and Eye Rehabilitation, Medical University of Bialystok, Waszyngtona 17, 15-274 Bialystok, Poland
2. Department of Ophthalmology, Subcarpathian Hospital in Krosno, Korczynska 57, 38-400 Krosno, Poland
3. Department of Immunobiology and Environment Microbiology, Institute of Maritime and Tropical Medicine, Medical University of Gdansk, Dębinki 7, 80-210 Gdańsk, Poland