1. Department of Oncology, University Hospital of Geneva, Geneva, Switzerland
2. Ecole Polytechnique Fédérale de Lausanne, School of Life Sciences, Swiss Institute for Experimental Cancer Research, Lausanne, Switzerland
3. Second Department of Pathology, Attikon University Hospital, National and Kapodistrian University of Athens, Athens, Greece
4. Institute of Pathology, Lausanne University Hospital Centre and University of Lausanne, Lausanne, Switzerland
5. Department of Visceral Surgery, Lausanne University Hospital Centre and University of Lausanne, Lausanne, Switzerland
6. Department of Oncology, University of Lausanne, Lausanne, Switzerland
7. Service de Chirurgie, Réseau Hospitalier Neuchâtelois, Neuchâtel, Switzerland