1. Faculty of Rehabilitation, Jozef Pilsudski University of Physical Education in Warsaw, Marymoncka 34, 00-968 Warsaw, Poland
2. Faculty of Physical Culture, Gdansk University of Physical Education and Sport, 80-336 Gdansk, Poland
3. Institute of Physical Culture Sciences, University of Szczecin, 70-453 Szczecin, Poland
4. Physiotherapy, Prince of Wales Hospital, Sydney, NSW 2031, Australia
5. Faculty of Medicine and Health, Sydney School of Health Sciences, The University of Sydney, Sydney, NSW 2006, Australia
6. Woolcock Institute of Medical Research, Sydney, NSW 2037, Australia