1. Department of General Ophthalmology, Medical University of Lublin, Lublin, Poland
2. Department of Didactics and Medical Simulation, Human Anatomy Chair, Medical University of Lublin, Lublin, Poland
3. Department of Mathematics and Medical Biostatistics, Medical University of Lublin, Lublin, Poland
4. Human Anatomy Department, Medical University of Lublin, Lublin, Poland
5. Department of Ophthalmology, University of Rostock, Rostock, Germany
6. Department of Experimental Pharmacology, Medical Research Centre, Polish Academy of Sciences, Warsaw, Poland