Authors
Krystyna Skibniewska
University of Warmia and Mazury in Olsztyn, Olsztyn, Poland
Janusz Guziur
University of Warmia and Mazury in Olsztyn, Olsztyn, Poland
Zbigniew Marzec
Medical University of Lublin, Lublin, Poland
Stanisław Zaręba
Medical University of Lublin, Lublin, Poland
Mirosław Grzybowski
University of Warmia and Mazury in Olsztyn, Olsztyn, Poland
Józef Szarek
University of Warmia and Mazury in Olsztyn, Olsztyn, Poland