1. Department of Surgery; Erasmus MC University Medical Center Rotterdam; Rotterdam The Netherlands
2. Department of General; Visceral and Pediatric Surgery; University of Düsseldorf; Düsseldorf Germany
3. Jersey Shore University Medical Center; Neptune New Jersey
4. Division of Hematology - Oncology; Warren Alpert School of Medicine, Brown University; Providence Rhode Island
5. Departments of Surgery and Radiotherapy; University Medical Center; Utrecht The Netherlands
6. Department of Surgery; University Hospital Zurich; Zurich Switzerland
7. FMUSP and Nucleus of General and Specialized Surgery; Sao Paulo Brazil