Authors
Barbara Nieradko-Iwanicka
barbara.nieradko-iwanicka@umlub.pl
Chair and Department of Hygiene and Epidemiology, Medical University of Lublin, Poland
Grzegorz Borzęcki
Chair and Department of Hygiene and Epidemiology, Medical University of Lublin, Poland
Marcin Orłowski
Medical clinic New Chelm Sp. z o.o, Diagnostic and Therapy Center for Gastrointestinal Diseases, Gdańsk, Poland