1. Department of General, Visceral and Transplant Surgery, Hannover Medical School; Hannover Germany
2. Core Facility for Quality Management and Health Technology Assessment in Transplantation, Integrated Research and Treatment Centre Transplantation (IFB-Tx), Hannover Medical School; Hannover Germany
3. Liver and Hepato-Pancreato-Biliary Unit, Queen Elizabeth Hospital; Birmingham UK
4. Department of General, Visceral, Thoracic, Transplant and Paediatric Surgery; University Medical Centre Schleswig-Holstein; Kiel Germany