1 | Medical University of Bialystok, Department of Public Health, Białystok, Poland |
2 | National Institute of Public Health – National Institute of Hygiene, Warsaw, Poland |
3 | Maria Skłodowska-Curie Bialystok Oncology Centre, Białystok, Poland |
4 | Medical University of Poznań, Department of Hygiene, Poznań, Poland |