1 Department of Internal Diseases, Allergology and Clinical Immunology, School of Medicine with the Division of Dentistry in Zabrze, Medical University of Silesia, Katowice, Poland. E-mail: zbrzoza@mp.pl.
2 Department of Internal Diseases, Diabetology and Nephrology, School of Medicine with the Division of Dentistry in Zabrze, Medical University of Silesia, Katowice Poland.
3 Clinic of Allergology, Rybnik, Poland.
4 Department of Internal Diseases and Nephrodiabetology, Medical University of Lodz, Lodz, Poland.