1. Institute of Pathology; University of Bern; Bern Switzerland
2. Institute of Pathology; Cantonal Hospital Baselland; Liestal Switzerland
3. Department of Medical Oncology; Bern University Hospital; Bern Switzerland
4. Division of Medical Oncology; Norris Comprehensive Cancer Center; Keck School of Medicine; University of Southern California; Los Angeles CA USA
5. Departments of Visceral Surgery and Medicine; Bern University Hospital; Bern Switzerland
6. Department of Surgery; Bürgerspital Solothurn; Solothurn Switzerland