1 Department of Pneumonology, Faculty of Medical Sciences in Katowice, Medical University of Silesia, Katowice, Poland.
2 Internal Medicine, Connective Tissue Diseases and Geriatrics Department, Medical University of Gdańsk, Gdańsk, Poland.
3 Department of Anaesthesiology and Intensive Care, Medical University of Silesia, Katowice, Poland.
4 Department of Medical Education of the Jagiellonian University Medical College, Kraków, Poland.
5 Department of Pediatric Surgery and Pediatric Urology, Upper Silesian Child Health Centre, School of Medicine in Katowice, Medical University of Silesia in Katowice, Katowice, Poland.