1. Laboratory of Tumor Markers, Department of Pathology and Laboratory Diagnostics, Maria Sklodowska-Curie Memorial Cancer Centre and Institute of Oncology, Warsaw, Poland
2. Department of Oncological Gastroenterology, Maria Sklodowska-Curie Cancer Center and Institute of Oncology, Warsaw, Poland
3. Genomics and Epigenetics Division, Garvan Institute of Medical Research, Epigenetics Research Laboratory, Darlinghurst, New South Wales, Australia
4. Faculty of Medicine, St Vincent’s Clinical School, University of New South Wales, Darlinghurst, New South Wales, Australia
5. Laboratory of Pathology, Department of Pathology and Laboratory Diagnostics, Maria Sklodowska-Curie Cancer Center and Institute of Oncology, Warsaw, Poland