Authors
Angelika Szymczak
Department of Public Health, Medical University of Lublin, Lublin, Poland
Piotr Ksiazek
Department of Public Health, Medical University of Lublin, Lublin, Poland
Sylwia Mojsym-Korybska
Department of Public Health, Medical University of Lublin, Lublin, Poland
Wojciech Skorupa
Clinic of Tuberculosis and Lung Diseases in Warsaw, Warszawa, Poland
Albertyna Zbikowska-Machul
Independent Public Health Care Center in Puławy, Pulawy, Poland