1 Department of Pediatric Pneumonology, Allergology and Clinical Immunology, Institute of Pediatrics, Poznan University of Medical Sciences, Poznan, Poland.
2 Health Promotion Department, Poznan University of Medical Sciences, Greater Poland Pediatric Center, Poznan, Poland.
3 Greater Poland Pediatric Center, Poznan, Poland.
4 Central Laboratory, Karol Jonscher's Clinical Hospital, Poznan University of Medical Sciences, Poznan, Poland.
5 Department of Pediatric Radiology, Institute of Pediatrics, Poznan University of Medical Sciences, Poznan, Poland.