1. Surgery; 65 Thames St Chatham Ontario Canada N7L 1S4
2. Canadian Forces; 1 Canadian Field Hospital; C4-212, University Hospital London Ontario Canada N6A 5A5
3. 128 Brian Ave London Canada ON N6G 2L7
4. University of Western Ontario; Division of Thoracic Surgery; London Health Sciences Centre 375 South Street, Suite N345 London Ontario Canada N6A 4G5
5. Rigshospitalet; Dept. of Hepatology A2121; Blegdamsvej 9 Copenhagen O Denmark 2100
6. Copenhagen Trial Unit, Centre for Clinical Intervention Research, Department 3344, Rigshospitalet, Copenhagen University Hospital; Cochrane Hepato-Biliary Group; Blegdamsvej 9 Copenhagen Denmark DK-2100