1. Department of Ophthalmology, Voivodship Hospital in Lomza, 18-400 Lomza, Poland
2. Department of Ophthalmology and Eye Rehabilitation, Medical University of Bialystok, 15-089 Bialystok, Poland
3. Department of Immunobiology and Environmental Microbiology, Medical University of Gdansk, 80-211 Gdansk, Poland