1. Clinical Department of Internal Diseases, Allergology and Clinical Immunology, Medical University of Silesia, Katowice
2. Clinical Department of Otolaryngology in Zabrze, Medical University of Silesia, Katowice
3. Department of Internal Diseases, Dermatology and Allergology, Medical University of Silesia in Katowice
4. Department of Pediatric in Zabrze, Medical University of Silesia, Poland