[1] UNIV COPENHAGEN,RIGSHOSP,DEPT VASC SURG,DK-2100 COPENHAGEN,DENMARK
[2] UNIV COPENHAGEN,RIGSHOSP,DEPT ANESTHESIA,DK-2100 COPENHAGEN,DENMARK
[3] UNIV COPENHAGEN,RIGSHOSP,DEPT SURG GASTROENTEROL,DK-2100 COPENHAGEN,DENMARK
[4] UNIV COPENHAGEN,RIGSHOSP,DEPT NEUROSURG,DK-2100 COPENHAGEN,DENMARK