1. Department of Gastroenterology, Hepatology and Clinical Oncology, Centre of Postgraduate Medical Education, Warsaw, Poland
2. Department of Oncological Gastroenterology, Maria Sklodowska-Curie National Research Institute of Oncology, Warsaw, Poland
3. Department of Analyses and Strategy, Ministry of Health of the Republic of Poland, Warsaw, Poland
4. Institute of Health and Society, University of Oslo, Oslo, Norway
5. Department of Epidemiology and Cancer Prevention, Maria Sklodowska-Curie National Research Institute of Oncology, Warsaw, Poland