1. Department of Digestive Surgery, Medical School, Université Libre de Bruxelles, Jules Bordet Institute, Brussels, Belgium.
2. Department of Medical Hematology, Medical School, Université Libre de Bruxelles, Jules Bordet Institute and CHU Brugmann, Brussels, Belgium.
3. Department of Pathology, Medical School, Université Libre de Bruxelles, Jules Bordet Institute, Brussels, Belgium.