1. The Chair and Department of Biochemistry and Molecular Biology, Medical University, 20-093 Lublin, Poland
2. Department of Physiology, Institute of Biomedicine, University of Turku, 20520 Turku, Finland
3. Faculty of Natural Sciences and Technology, Åbo Akademi University, 20500 Turku, Finland
4. Department of Otolaryngology, MSW Hospital, 20-331 Lublin, Poland