1. Clinic of Rehabilitation, Provincial Specialist Children’s Hospital in Olsztyn, 18A Żołnierska Street, 10-561 Olsztyn, Poland
2. Department of Pathophysiology, School of Medicine, Collegium Medicum, University of Warmia and Mazury, 30 Warszawska Street, 10-082 Olsztyn, Poland
3. Department of Rehabilitation, School of Medicine, Collegium Medicum, University of Warmia and Mazury, 18A Żołnierska Street, 10-561 Olsztyn, Poland