1. Department of Orthopaedics and Trauma Surgery, Musculoskeletal University Center Munich (MUM), University Hospital, LMU Munich, Marchioninistraße 15, 81377 Munich, Germany
2. Division of Gastroenterology, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA 02115, USA
3. Department of Hand, Plastic and Aesthetic Surgery, LMU Munich, 81377 Munich, Germany
4. Department of Trauma Surgery, Trauma Center Murnau, 82418 Murnau am Staffelsee, Germany