1. Rigshospitalet, Copenhagen University Hospital; Department of Cardiology, The Heart Centre; Blegdamsvej 9 Copenhagen Denmark 2100
2. The Heart Centre, Rigshospitalet, Copenhagen University Hospital; Department of Cardiology; Blegdamsvej 9 Copenhagen Denmark 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
5. University of Exeter Medical School; Institute of Health Research; Exeter UK EX2 4SG