Gunnar Loske1, Ernst Scharsack1, Olaf Gobrecht2. 1. Department for General, Abdominal, Thoracic and Vascular Surgery, Katholisches Marienkrankenhaus Hamburg gGmbH, Hamburg, Germany. 2. Department for Medical Oncology and Hematology, Gastroenterology and Infectious Diseases, Katholisches Marienkrankenhaus Hamburg gGmbH, Hamburg, Germany.