1. Department and Clinic of Ophthalmology, School of Medicine in Katowice, Medical University of Silesia, Katowice, Poland
2. Department of Biochemistry, School of Medicine with the Division of Dentistry in Zabrze, Medical University of Silesia, Katowice, Poland
3. Department of Radiotherapy, Maria Sklodowska-Curie Memorial Cancer Center and Institute of Oncology, Gliwice Branch, Poland