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