Christensen P1, Bazzocchi G2, Coggrave M3, Abel R4, Hultling C5, Krogh K6, Media S7, Laurberg S1 1. Surgical Research Unit, Department of Surgery P, Aarhus University Hospital, Denmark, 2. Montecatone Rehabilitation Institute, University of Bologna, Italy, 3. National Spinal Injuries Centre, Stoke Mandeville Hospital, United Kingdom, 4. Orthopadische Universitatsklinik Heidelberg, Germany, 5. Spinalis, Karolinska Sjukhuset, Stockholm, Sweden, 6. Department of Hepatology and Gastroenterology, Aarhus University Hospital, Denmark, 7. Centre for Paraplegia, Viborg Hospital, Denmark