1. Prof. Adam Gruca Independent Public Clinical Hospital CMKP, 05-400 Otwock, Poland
2. Centre of Postgraduate Medical Education, 01-813 Warsaw, Poland
3. Department of Physiotherapy, College of Rehabilitation, 01-234 Warsaw, Poland
4. Department of Physiotherapy, Prof. Jan Bogdanowicz Children’s Hospital, 03-924 Warsaw, Poland
5. Department of Rehabilitation and Orthopedics, School of Medicine, Collegium Medicum, University of Warmia and Mazury in Olsztyn, 10-719 Olsztyn, Poland
6. Regional Specialised Children’s Hospital, 10-561 Olsztyn, Poland
7. Department of Ecology and Environmental Protection, University of Warmia and Mazury in Olsztyn, 10-719 Olsztyn, Poland