1. The Finsen Centre, section 5073, Rigshospitalet; Department of Oncology; Blegdamsvej 9 Copenhagen Denmark DK-2100
2. Copenhagen Trial Unit, Centre for Clinical Intervention Research, Department 3344, Rigshospitalet, Copenhagen University Hospital; Blegdamsvej 9 Copenhagen Denmark DK-2100
3. Copenhagen Trial Unit, Centre for Clinical Intervention Research, Department 3344, Rigshospitalet, Copenhagen University Hospital; The Cochrane Hepato-Biliary Group; Blegdamsvej 9 Copenhagen Denmark DK-2100