1. Copenhagen University Hospital, Rigshospitalet; Department of Cardiology, The Heart Centre; Blegdamsvej 9 Copenhagen Denmark 2100
2. University of Exeter Medical School; Institute of Health Research; South Cloisters, St Luke's Campus, Heavitree Road Exeter UK EX2 4SG
3. Department 7812, Rigshospitalet, Copenhagen University Hospital; Copenhagen Trial Unit, Centre for Clinical Intervention Research; Blegdamsvej 9 Copenhagen Denmark DK-2100
4. Copenhagen Trial Unit, Centre for Clinical Intervention Research, Department 7812, Rigshospitalet, Copenhagen University Hospital; Cochrane Hepato-Biliary Group; Blegdamsvej 9 Copenhagen Sjaelland Denmark DK-2100
5. Holbaek Hospital; Department of Cardiology; Holbaek Denmark 4300