1. Institute of Health Sciences, Pomeranian University in Slupsk, Westerplatte 64, 76-200 Slupsk, Poland
2. Provincial Specialist Hospital named after Janusz Korczak in Slupsk, Hubalczyków 1, 76-200 Slupsk, Poland
3. Faculty of Social and Humanities, WSB Merito University in Gdansk, Aleja Grunwaldzka 238A, 80-266 Gdansk, Poland
4. Institute of Pedagogy, Pomeranian University in Slupsk, Westerplatte 64, 76-200 Slupsk, Poland