1. Rigshospitalet, Copenhagen University Hospital; Copenhagen Trial Unit, Centre for Clinical Intervention Research, Department 7812; Blegdamsvej 9 Copenhagen Denmark DK-2100
2. Rigshospitalet, Copenhagen University Hospital; Department of Cardiothoracic Surgery, RT 2152; Blegdamsvej 9 Copenhagen Denmark DK-2100
3. Copenhagen University Hospital; Department of Cardiology B; Blegdamsvej 9 Copenhagen Denmark DK-2100
4. Copenhagen Trial Unit, Centre for Clinical Intervention Research, Department 7812, Rigshospitalet, Copenhagen University Hospital; The Cochrane Hepato-Biliary Group; Blegdamsvej 9 Copenhagen Denmark DK-2100