1 Senior Lecturer, Physiotherapy Group, University School of Physical Education in Wroclaw, Wroclaw, Poland; Physiotherapy Institute, Public Higher Medical Professional School in Opole, Opole, Poland.
2 Assistant Professor, Physiotherapy Group, University School of Physical Education in Wroclaw, Wroclaw, Poland; Physiotherapy Institute, Public Higher Medical Professional School in Opole, Opole, Poland.
3 Assistant Lecturer, Physiotherapy Group, University School of Physical Education in Wroclaw, Wroclaw, Poland.
4 Assistant Professor, Family Medicine Department, Wroclaw Medical University, Wroclaw, Poland; Nursing Institute, Public Higher Medical Professional School in Opole, Opole, Poland. Electronic address: dkurpas@hotmail.com.